Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5628c8d362088c5…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 14:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cf7875e8ecc7c4f85326599bd11a3347 SHA-1: 86d3639bf348cf51aebc64a162df7dfe5f4be0c6 SHA-256: f5628c8d362088c5544d8e00731b1a84ab402f86d80edd9d68f08a9e91510456
126 Risk Score

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 0.9997

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://docita.fun/peterujetujenuwenuwafivrfmnc.pdf In PDF document text
    • https://cdn.sqhk.co/muzolorakow/bJlhagf/bebupenuzosuragoda.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/8947397.pdfIn PDF document text
    • http://agentsecure.space/mixet2hdio.pdfIn PDF document text
    • https://fifesijewawo.weebly.com/uploads/1/3/1/4/131412558/e66ab0a3.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/vajeb.pdfIn PDF document text
    • http://copalofa.site/81780932480wt80p.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/kKicLPb/promo_code_ubereats_mcdonalds_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/dhjijTh/zenkit_ou_trello.pdfIn PDF document text
    • http://dmdmassage.com/22442656644aopoq.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/telapojivefupig-rabazog-pezep.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/zopevonibefire_jasidapanovafog_xejipumim.pdfIn PDF document text
    • http://cabinetsly.xyz/free_family_worksheets_eslapg7r.pdfIn PDF document text
    • http://sandwichhq.club/436777249860bp8t.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/dewajawijaxomifizeli.pdfIn PDF document text
    • http://acgmgroup.ru/37679168499ytmrk.pdfIn PDF document text
    • http://tegor.xyz/why_is_my_badger_garbage_disposal_not_workingt02cp.pdfIn PDF document text
    • https://wolagevujizerul.weebly.com/uploads/1/3/5/3/135316080/5160425.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=how%20to%20bypass%20printer%20low%20ink%20canonPDF link annotation
    • http://kisalonokexiwi.atwebpages.com/63462339477.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/pokemon_books_for_cards.pdfIn PDF document text
    • http://kalasoziluxolim.myartsonline.com/husqvarna_235_chainsaw_owners_manual.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_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 5288 bytes
SHA-256: 71a9ded0d1f5ce8cfffa0ee4803dea231059f8918aa9d769843930143f9f9fe4
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 11160 bytes
SHA-256: 5b90d013ee507cd8eed404e50e2f158bbd0da3c7ec695374ef46ca01b513f67a

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