Malicious PDF — malware analysis report

Static analysis result for SHA-256 5500d27c514a9b54…

MALICIOUS

PDF

75.3 KB Created: 2021-11-08 11:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: c8f6dc62f72953c8a2fefc4cb02b8c57 SHA-1: bd98cc253edc9767d3568997a21d9e7eff72f840 SHA-256: 5500d27c514a9b545c79ea84fed051ba6b851461bf1a9601f8379772db4d0ba9
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 https://garglob.ru/uplcv?utm_term=arp+request+frame PDF link annotation
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16170d3e6a31a6---wumow.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f11e1970b066f0db1af549cbdd0583b1/86266869784.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5859c85dd4f7d6e645b656abbdc40331/volazubagasesu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/b286821b503683e9392a007b617864ad/66184710811.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/25885014830.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/tafusugun.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/dosuwas.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/85493131381.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/17941823496.pdfIn PDF document text
    • http://cataga.de/beta/files/file/pitazikiliw.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/jawapujoduripitata.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16179e8fe97324---fajotiwiniretur.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/nokilabikiduveborito.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/kujegagogegegob.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/98726964252.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/fowifusinadurabegamu.pdfIn PDF document text
    • https://kimansion.com/uploads/file/66767478451.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/dutagu.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/25101534778.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16353531427906.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/16515208581.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/97422270060.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/k66sg5qjd46a3tml3beno9pum0/73786598589.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/1152259340.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/315f5d3a37ea0f527fb649fcde1fc0ec/39754937862.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617e6eafd8f69---14620582446.pdfIn PDF document text
    • 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_off0000c11b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c11b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11B 10384 bytes
SHA-256: 62d76eca8003b8c2b7308dcaf961f5891f8e9843f5d3906461fa1531c7bdd41e
font_01_sfnt_off0000d8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A5 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 18224 bytes
SHA-256: 1fbbaf0f0c506a72c1393e7df8a0a862adaf10814f2454519c169b36757f3185