Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daf9a7febef1926…

MALICIOUS

PDF

77.1 KB Created: 2021-06-13 14:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5cb4bb84b020a578bd371f526fbc2bef SHA-1: 0d59019bd946221e75e1ce9a8864c00f6a338f3e SHA-256: 1daf9a7febef19264c361bf5333535634756aa6278d166a3dfe938cffecdacb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains keywords related to a "Warhammer 40k" codex, likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://nomylo.ru/uplcv?utm_term=warhammer+40k+space+marine+codex+pdf+8th PDF link annotation
    • http://ankamet.com/userfiles/file/xafefob.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/52300594804.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072e5724fa02---damikamegefepesi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/13224836910.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/fugevesevepeguzum.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/mexuwagapidanavebejemo.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d0b33bd3a---50744575668.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/pivododasunodakunovevoxa.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/34798857791.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e4d9aa65a---kerisegedadupelu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o5gco124vpqr09vuag1bqpud9r/kunujebup.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e63b0895b1---zumutororabamunereve.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/65811076768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 5932 bytes
SHA-256: 1efe90bce36e9e4640ccd17394df74ab4d33bc1e96713500867976e8e488194a
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10960 bytes
SHA-256: d5838327ccf0fa9cb047ad0cf1214e94a7c67841ff90b8f00c60b653591c9463

Open this report in the interactive analyzer, or submit your own file for analysis.