Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0eed5ed91ab476…

MALICIOUS

PDF

83.7 KB Created: 2021-10-09 00:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 00b5f9765e88e2a6f9ac2a53567a8589 SHA-1: dd59aba7067adc264a8696b043caa2135157aa53 SHA-256: 8d0eed5ed91ab4767b98e47c2461063a53a1ade57bde5b64473aba8a346ed936
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO abuse. The presence of multiple external URIs and link farm heuristics points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://1hozain.ru/files/userfiles/files/pegaveviminakodazafevit.pdf In PDF document text
    • https://landtop.com/filespath/files/20210904181435.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/dazilofenanipavego.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/bawejosuwejema.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16158034071768---suwufixojisavi.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/korer.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/863669435.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/92404303860.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/kesaxavigazebalopu.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/vozobonugi.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/26149824734.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/vofafelut.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/34973683316.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/tixaketofogidekovoruk.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/fba569fdf0c36314354cb5274f2ca7fb/10376945665.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/70875290697.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/bugatalagizofinakol.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7687fb2197abdae9a891fb54f641ac28/safetojujexesa.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///lasulegabujuj.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/40061162531.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/bapewazugitomimakakik.pdfIn PDF document text
    • https://thegmsbihta.eruditiontech.com/userfiles/file/roliloz.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1615c3b911d1e1---laralumotanoke.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/16622929347.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/fojuwuxabumuri.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/78810914986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=general+knowledge+questions+book+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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 18496 bytes
SHA-256: a1d28be9424c950957efd9f1cefd8969ccb3ffc75ed74326438d22b6daf76bac
font_01_sfnt_off00010f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 11276 bytes
SHA-256: 93f2a3d2aa272c367c8b4de890c89c3bab6f9a5fa5d3054c1a496166fce4aea5
font_02_sfnt_off00012906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1