Malicious PDF — malware analysis report

Static analysis result for SHA-256 01941754301cf1ab…

MALICIOUS

PDF

87.0 KB Created: 2021-04-07 00:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8f7349953b9b32daf237b0556970407 SHA-1: ed6bd5c66232f4afc5b0fed2eabe442fb93229a4 SHA-256: 01941754301cf1ab0b84b350e4db5cd24ec965d4ad2f132edd6980f235264703
156 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 0.9997

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 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.
  • 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://jacksth.ru/123?utm_term=kwid+car+video+player+software PDF link annotation
    • http://mainsale.pro/sufotalisibofeferiphkzib.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/34b2c917d998982.pdfIn PDF document text
    • http://copyrightreports.com/lokujegewedejasorulinegw41zm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_606cd4777ffa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366622/normal_5fe52d2a3eff6.pdfIn PDF document text
    • https://dedorewesapizeb.weebly.com/uploads/1/3/4/2/134265869/wepiwefufegus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_6059a1db86054.pdfIn PDF document text
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/1674782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_601dfd8e40e54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_6002524285d29.pdfIn PDF document text
    • http://topshops.website/sh_digraph_printable_worksheetsxj9i3.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/xetasif/nomefugusajev.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/daxosipu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/gugimaratutevozeza.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/romantic_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/weworuzaroliromaj.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/2692169377.pdfIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_2404b5011c9c4428ab818e8d433daf8a.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_63f7a0b6cce7405da5b64193e6aeb590.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/1058491553.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_344c83d171d6400fb2e26a1fea54b561.pdf?index=trueIn 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_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 5372 bytes
SHA-256: 0ff7dbfeb74e0914e1ca36308596e012c865b122132f9852c4cc5691b6b632fd
font_01_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 11736 bytes
SHA-256: a30ad9e4cc5418c6c597c635ea3cf8128f6236346e066cb8989392b71ac4eb55

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