Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6ae4e3b06b2eb4…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 15:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 560269c3f9d12d29ccddda63733ac54e SHA-1: d97fac3c3df05435cf402b0238c6ef8cf15b50d9 SHA-256: cc6ae4e3b06b2eb497a100f64c212df63efae5a0b54400f5375fa85dd822f9d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://dugedepap.ru/wix?keyword=deer+anatomy+target PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419630/normal_603cbff23f30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449996/normal_6032cc12d23c9.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/Pji2pcT/dr_driving_2_mod_apk_unlimited_fuel.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/fizowun_nilobo_dajuxebisebew_zirokapefimike.pdfIn PDF document text
    • https://geduletulaf.weebly.com/uploads/1/3/4/5/134509924/4565183.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/4065a7a.pdfIn PDF document text
    • https://molemopiwe.weebly.com/uploads/1/3/1/8/131856052/3431437.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/dSB03nO/transference_and_countertransference_ppt.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/suverebozit.pdfIn PDF document text
    • https://nasokeluvofof.weebly.com/uploads/1/3/1/4/131453401/kutetoneroleju.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/hp_officejet_4500_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fowizolomam/Xzygeif/the_tiger_rising_book.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/obkOAii/74870095238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_601fe1b530ce4.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/gdjf2gd/wordpress_download_link_plugin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://widepidaba.atwebpages.com/82716749886.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 4636 bytes
SHA-256: 333fafa8b4c187cd1cfd6d9788cbf675c5864f4c3ceaf9cf38a26707f1b56556
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 9824 bytes
SHA-256: 43f08776768278f88d61940ebab981832105ae03d1e9fbd109aff081a0a73f23
font_02_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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