Malicious PDF — malware analysis report

Static analysis result for SHA-256 0846251c3d81383b…

MALICIOUS

PDF

71.1 KB Created: 2021-05-19 00:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 58a9679bb5b7deeeea29a16e7121ce53 SHA-1: d9da443e6118d03bc33ee2c3296f2a61e578664f SHA-256: 0846251c3d81383baa02c4eac3c00ea9c82aa43c54b12d6eaa805bb407bfc275
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 0.9996

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://pelibifir.ru/strik?utm_term=bmw+e90+320d+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418171/normal_5fe4a66c10597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5fe1aada534f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_6026075240336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ffdc68d35700.pdfIn PDF document text
    • https://fugazuxelodurip.weebly.com/uploads/1/3/4/6/134639195/0b988f3278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_6058bef065db7.pdfIn PDF document text
    • https://zirofapenepag.weebly.com/uploads/1/3/4/8/134855920/mubovitarab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_606e8a77eb518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_6063e303d771f.pdfIn PDF document text
    • https://rutokiwudobuvu.weebly.com/uploads/1/3/4/6/134686771/mapaba.pdfIn PDF document text
    • https://xorewodanuvidiw.weebly.com/uploads/1/3/1/3/131381095/pazamokeputigajoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_603424c1cba00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_602b4cadb3eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_6038d3d3604b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_603ce5e3ae944.pdfIn PDF document text
    • http://zofozefevuf.iblogger.org/arbitration_act_1940_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407571/normal_5fc752cb2d210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_605f6e911bea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_604ccdd874993.pdfIn PDF document text
    • https://zuripiri.weebly.com/uploads/1/3/1/8/131856797/sujesesabema-beninoso-xisup-kupijan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxadawimuwewar.epizy.com/achondroplasia_dwarfism.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_off0000d4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 5704 bytes
SHA-256: edebfe1de880a16025d82cc80721fc535a37c213408354c9938f28518bba7391
font_01_sfnt_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 11016 bytes
SHA-256: 2a64db3d3d0373a2b1cbb6fbb2f25a5699dfb3fd26219711de0fbf728d2b7469

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