Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8adc5f302a661…

MALICIOUS

PDF

72.9 KB Created: 2021-03-20 14:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ed499f7a5d4d51eaf5aa295195495c9 SHA-1: 2d7432101f1e7d527446f7d7ba38c7ddec98c352 SHA-256: d2a8adc5f302a66127ba87e84255a3e52b3fcc9538a161879e0b99be69e99bc1
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://jumiwimov.ru/strik?utm_term=percy+jackson+the+lightning+thief+summary+chapter+8 PDF link annotation
    • http://heliusdesign.ru/yamaha_yas_101oh7ht.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/3391609.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/12497867739.pdfIn PDF document text
    • http://7evenrp.ru/best_online_daily_planner_app9bb11.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/wijavo.pdfIn PDF document text
    • http://goodsun.fun/mtd_lawn_mower_parts_canadazv6ov.pdfIn PDF document text
    • http://afracheat8.xyz/34828249045gdov8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_6027378b75f64.pdfIn PDF document text
    • http://youla-24.cc/1988_layton_travel_trailer_owners_manualaneue.pdfIn PDF document text
    • http://spainwow.pro/vizodifowlu0i1.pdfIn PDF document text
    • http://lynciguest.com/32214782773lm2qt.pdfIn PDF document text
    • http://m-ryanaf.site/660827698158oeg8.pdfIn PDF document text
    • http://getyourscore.info/mepubanetuxaposekozuz42i8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5febd891b9a01.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/e44c58f7.pdfIn PDF document text
    • http://jopkapopka.online/sokonetipogeweupdmi.pdfIn PDF document text
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/jasotajoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_6043ff81039de.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_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 5868 bytes
SHA-256: 599c0646825555b6cea0e1708602a94e2b244ce1dcb9175d6105c67c0a2e867a
font_01_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 9636 bytes
SHA-256: 4ef3f72f4111561f00796e067eb002ef69462988eb39593278c31a9356749ead

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