Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f489e019904b304…

MALICIOUS

PDF

80.9 KB Created: 2021-03-12 02:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ba6fb7088eeabcd7baaf6f68586899c8 SHA-1: 81420c5c6cad561bdefe081ca1908ff16106eb06 SHA-256: 8f489e019904b304c2c9521a7faae906ab18dfdee15a53d4e65557cafec01a6c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=glencoe+health+chapter+1+test+form+a+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5fca828c45c49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6010cd5fbe0e3.pdfIn PDF document text
    • http://shoppingyxplus.xyz/how_to_renew_lapsed_cosmetology_license_in_georgia0ka0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_601636376175a.pdfIn PDF document text
    • https://texodixoxi.weebly.com/uploads/1/3/1/8/131857215/jopivipirowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_6023fe6bd972f.pdfIn PDF document text
    • http://artelamp.store/485012225715yjbl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5fdc3bc0be54a.pdfIn PDF document text
    • https://zugatesek.weebly.com/uploads/1/3/6/0/136082504/novanepegazolisuzof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368218/normal_5fefe41ce86da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_5ff159620ab0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_60148ab25b5fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd613ca2a83a.pdfIn PDF document text
    • http://cetop.xyz/13976270057kda1d.pdfIn PDF document text
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/3f39f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_601fb59552194.pdfIn PDF document text
    • http://insta-sale.site/solicitud_de_comipems_2019_para_imprimiru6p6s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fcd608acf2ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_603defd5a44f0.pdfIn PDF document text
    • http://myfavoritesun.xyz/duxiwajototorememw2fm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/zuzaren.pdfIn PDF document text
    • http://rusavuwirajul.rf.gd/diet_meal_plan_to_lose_weight.pdfIn PDF document text
    • http://vigakike.rf.gd/vetedadudinepinozari.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_off00010087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10087 5596 bytes
SHA-256: ae98ad457e6818944e9f7de646f8d9bba3977234a36b77c0b893c63a26a75b94
font_01_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 9988 bytes
SHA-256: 07df578d414714405c32a22db88596dc1fa0fb68f86f3e93d55d69c646eff8fe

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