Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f661827c1c873f6…

MALICIOUS

PDF

305.0 KB Created: 2022-01-28 13:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-30
MD5: 246400f62bf0fb1f45735aeb1c5de3ce SHA-1: 7573786b1b78fbcf8fb902dbd9378532e763eb45 SHA-256: 8f661827c1c873f6bae10148a4a214fca03c58e928d6b4f8ac8f3ba3938cc199
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8109

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://nbnjl.com/userfiles/files/dolafixijexipijojik.pdf In PDF document text
    • https://alhasooncorp.com/Files/files/wotuzoxijeladibeboxiwe.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/78851845977.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/66522043142.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/11783344978.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/sidegajusunavo.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/609094423.pdfIn PDF document text
    • http://iharoskezmuvesek.hu/ckeditor/kcfinder/upload/files/wabexin.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/rofowekagok.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/rokitetode.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/15007757880.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/9a228e6b9eb8ef8e2c25fd38b99b1aba/karuvavefuxet.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/sewodalijaj.pdfIn PDF document text
    • http://kochi-east-rc.com/admin/kcfinder/upload/files/56787260698.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/74338649230.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/dubunowomaketosedo.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/galotaveresipedajox.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613033465c1bc---31123214900.pdfIn PDF document text
    • https://orrizon.ru/images/file/16142549942.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/59295494874.pdfIn PDF document text
    • http://seikico.net/img/files/zolabodabolubirimisowames.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/wawefuxawojirekagixijev.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/mipol49lta80lvrridfp4vse2b/94289418789.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/204704_kabunuxebukazobaxizivokor.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/juboborogafapujipotireza.pdfIn PDF document text
    • http://vitrine-prof.com/files/fuzatekedez.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1635594897.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/75415685923.pdfIn PDF document text
    • http://hzqzg.com/d/files/68275439355.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/rulepepiz.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/27422932636.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/novevijiwofunobewamawiso.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/rurowafigonaziwiwo.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/8284304027.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/47498593064.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/nedutofijazetux.pdfIn PDF document text
    • https://tevav.co.za/XSRYdR1H?utm_term=american+diabetes+association%28+ada+2016+guidelines+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00045644.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00045644.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45644 16716 bytes
SHA-256: f993cc69685498b80c1c91fd63e1a6140505daa9c8fb4cbdb37a16355213195b
font_01_sfnt_off000481e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x481E8 11724 bytes
SHA-256: 5a70069c8cda060254b80164309e400f5e4ae156ad56e54e18fc30324466ccbc
font_02_sfnt_off00049d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49D9D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336