Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3711c93d6cd2fb…

MALICIOUS

PDF

68.4 KB Created: 2021-06-02 15:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8371f810f16fd102801a280740899747 SHA-1: ddb909eb298f4f33da59dc9230dc71ca7a1a513c SHA-256: fe3711c93d6cd2fb59f9e37cc9eeb33850f169accb3c611e2cebd91a12872140
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 0.9992

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://ketchas.ru/pbw?utm_term=vaastav+ganesh+aarti+mp3+songs+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462982/normal_5fe96153b1a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_6044d46365dbd.pdfIn PDF document text
    • https://xetofevona.weebly.com/uploads/1/3/1/3/131379012/fedefodizugukure.pdfIn PDF document text
    • https://roluwisotem.weebly.com/uploads/1/3/4/3/134368144/majisunox_weniwopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_6062b4711ccfe.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/poxunozina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5ffeced849d09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d65d49b-d007-4c08-92bd-902df1af4685/free_bobbin_lace_making_patterns.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144499935/how_fast_will_starlink_internet_be.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c501596e-7f7f-4847-815f-690e4284db03/cavaliere_range_hood_reviews.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/90210514696.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144483672/buxobum.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/60814118236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752a1ac0-0fb6-45ee-9014-e9134952c391/how_to_designate_medical_power_of_attorney.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/58902641331.pdfIn PDF document text
    • http://siruzosu.pbworks.com/w/file/fetch/144445953/xulasemeniwu.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/f/descargar_dragon_ball_z_budokai_tenkaichi_3_mod_af_ps2.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144422229/zibekomalutisujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd5c0ef-2679-4cbc-9599-8db030d02c90/67960808281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5ffc54-2700-4056-a110-c1278cb34a09/xijilibotat.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144413601/43499665926.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/how_to_connect_dish_receiver_to_internet.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/list_closing_credits_movie.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 5736 bytes
SHA-256: ee21a5556864bb051cf03a3d1a8ee442d7c0789fd7fe85d6ca4d39c50e01db39
font_01_sfnt_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 9992 bytes
SHA-256: d51b1770d4bcf217ddc8a342774c519fa0ed19465fe674329603f366f0655651

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