Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e770d4ac8e9a1f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-10 13:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f29a74ec90f739eeb7a9f0a8f7a8316 SHA-1: b71f3c86fa475e32f36d0085242a0b1dc3f56459 SHA-256: c6e770d4ac8e9a1f390a60b0f5dd9a3585f27e9689d450aebb342cfd016d8169
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ashokarefrigeration.com/userfiles/file/gidevidinuvebekumukexe.pdf In PDF document text
    • https://reha.bg/content/upload/file/55251454760.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/zuvimawezum.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/45736745822.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/36533356706.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/46453645312.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/kekijarodesewejajo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613188be5b982---47435757024.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/93189384232.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/loxomasamim.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613759672ae24---fojawevubibal.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/19487648547.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/17721700019.pdfIn PDF document text
    • http://rooptex.com/uploads/14164386499.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/mebavufoxoxonuxepabiv.pdfIn PDF document text
    • http://moneymaker-gold.de/files/mokokilur.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/10887876198.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/40018265838.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/lajusefa.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/94774243429.pdfIn PDF document text
    • http://terfigyelokamera.info/files/file/79349598786.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/52487991767.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/naxuponogozuvifawed.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/75312849797.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/pekatusarisidero.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/80518722054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=rally+fury+extreme+racing+mod+apk+unlimited+moneyPDF 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_off0000d12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 17428 bytes
SHA-256: ed2dab3fed6f53ad0ce85f2f3e5e706ec482f860d8a6321034dbbd4f651db715
font_02_sfnt_off0001161f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161F 11248 bytes
SHA-256: cfe1ffcf1feb122bd62a006d799cab4decfa47253c15ee3a9dd2849c1c109e6d