Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b5f16f73192503…

MALICIOUS

PDF

80.0 KB Created: 2021-04-27 20:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8e136bef8bc9ed7fea0cd9eee665247 SHA-1: 59cc2a0156339fa9ff1da58d928f643e87ad8994 SHA-256: 27b5f16f7319250385f5f54c9734921dc7f532d49af08745caac3d111c19480e
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 0.9991

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/strik?utm_term=2010+bass+buggy+pontoon+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fdc14d6cf44b.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jjfha7o/xovenefemovuke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5fe5ed379d1aa.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/iCLjdjf/mufobagufuliralekarit.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/bgehc0h/tank_hero_laser_wars_free_download_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_6017a2e277c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_60337bfade3d8.pdfIn PDF document text
    • http://slimerecipe.org/37633985542057fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fe92bb04d756.pdfIn PDF document text
    • http://mmamba.ru/monsters_legends_battle_guide76ltp.pdfIn PDF document text
    • http://hot-money.fun/zizuno1bx36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_604ae1ae03a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_604ee21a0827a.pdfIn PDF document text
    • http://phulop.store/how_to_clean_waterpik_tipsrng2k.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/UjgiaHc/talking_shark_cartoon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373998/normal_5fc696d01abb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_601cbc045b7c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_6059aa4e6aba8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481676/normal_60090b091af65.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/ihcpehd/denasipowitorunev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_601cb5403f448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_60184915451c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedowedi/what_is_meant_by_gnostic.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/ringtones_instrumental_songs_free.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_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 5540 bytes
SHA-256: 12c1cfc203a44cfe02a2a6bc2cd203fba8b05f210e39311aa406408d6fcb00eb
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 11368 bytes
SHA-256: 4bb4cfa53b59d2dde759a964adfc848fb8b60eede308782fbc0dcd1804c49b31

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