Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca70d8f67a0cc1c…

MALICIOUS

PDF

84.7 KB Created: 2021-03-08 12:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ced5e0d91ee7d45bdf64282d5cd2e58 SHA-1: d99a439013ad2ce3ab1a2c4824968f4378cfbe6a SHA-256: fca70d8f67a0cc1c82a76c66b1e174c820adebc50756f1d75ea74a238dadb37e
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://bologen.ru/wix?keyword=adam+curtis+williams+rap+sheet PDF link annotation
    • http://moymagazin.xyz/listen_to_marine_radio_frequencies_uk4gg4l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6014308d12c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_6040de83221cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_602cf02984fbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5ff0899dac777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_60184dcfc84a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5ffe008956c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_601ff83b81da3.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/61739697322xlaht.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
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_3222d8f271814424b2e85de963f57435.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/53130284467.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/dogukegamimuvigenefib.pdfIn PDF document text
    • http://wuvasof.epizy.com/xusataw.pdfIn PDF document text
    • http://pefodajisotavuk.rf.gd/74396334849.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_6ad1410b61264a60b20898987b129fbd.pdf?index=trueIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_e0df012eecac4e10bfe347cd8cbaa696.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/19039058546.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_65ed1fd3b25e48318951486e5481cfb2.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_29d3ed0770264d4bb132fbc4a8ecd5e7.pdf?index=trueIn PDF document text
    • http://jometuxinuvalal.epizy.com/how_does_a_ct_shorting_block_work.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_off0000f5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 5060 bytes
SHA-256: 7f5100997c01bd6da75e93d13b06f0843d62b70150d706cbcf8f212f4ac2c757
font_01_sfnt_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 15780 bytes
SHA-256: 7ae18adcf642f7c8dd4f604a48cf9fe826848b3563e98f89a61ac1c285cc89d1
font_02_sfnt_off00013708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13708 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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