Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d291c76f78f8ab…

MALICIOUS

PDF

78.2 KB Created: 2021-04-21 21:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b11a16864a00a0ab47805e73881288f SHA-1: 1e3bed4549ef239adc674010b67e76ba50d1319e SHA-256: 35d291c76f78f8ab50d3b418b548a75b06ae541ba440ab021581741f94a7fb67
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 0.9996

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://seumenha.ru/strik?utm_term=verb+tense+exercises+printable PDF link annotation
    • http://delinapod.mypressonline.com/73534693193.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/framed_ink_drawing_and_composition_for_visual_storytellers.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/abcdaire_animaux.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/wukurobamizuwaroxos.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/zujakipupenaxokaxodul.pdfIn PDF document text
    • http://zifufarox.getenjoyment.net/mumovote.pdfIn PDF document text
    • https://bunuterujizid.weebly.com/uploads/1/3/4/8/134882333/46b98f4.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/cuales_signos_se_atraen.pdfIn PDF document text
    • http://palawawez.mypressonline.com/newumeputebajex.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/b221eea9a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_60307a58bac12.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/buchungsstze_einfach_erklrt.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/12668363341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_60660c092d34a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_5fe635afa47c9.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/rilidolisodovuxetew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newemepakirid.myartsonline.com/how_to_cancel_planet_fitness_membership_fee.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/biosensors_in_food_analysis.pdfIn PDF document text
    • http://sopexalibip.onlinewebshop.net/phonetic_pronunciation_guide.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/fepanezovuvato.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • http://kurerori.myartsonline.com/58248066618.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 5100 bytes
SHA-256: e3c988cd8f45af0b8890afdce4bd95567bdc911e30f5cfa0d54a2f6f83bf1660
font_01_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 11040 bytes
SHA-256: 555ad8a5ab338fe41d6114f7b112fc179291e215d8d739c733835cdda1b0ae44

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