Malicious PDF — malware analysis report

Static analysis result for SHA-256 b669486f56379523…

MALICIOUS

PDF

115.0 KB Created: 2021-02-15 23:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cf62d2f0901404d35aafab87cf47a030 SHA-1: 2bcbeb07e58256fa30a0b53087ac84d069913dcf SHA-256: b669486f5637952356c0ed15fe17a1af26543e4c156cfd3d22a8627f96829009
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 0.9998

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 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://seumenha.ru/wix?keyword=stickpage+stealing+the+diamond+unblocked PDF link annotation
    • https://tupunatuluzike.weebly.com/uploads/1/3/1/3/131383671/df1fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_60135dd7a627b.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/GjdKijh/dinaruwamubunubow.pdfIn PDF document text
    • http://com-signto2.xyz/concours_castor_informatique_2018_mathmatiquesyoqhd.pdfIn PDF document text
    • https://cdn.sqhk.co/gemesikexo/ifOmig4/pasedulowegova.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/aEhfIij/marorumadiza.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/8370688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fceef0008b0d.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/djdgjhb/prison_escape_walkthrough_level_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_60062cec0bdc5.pdfIn PDF document text
    • https://tijisifexabid.weebly.com/uploads/1/3/1/0/131070771/kiroxawepi.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/pupojinepapofabunuva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5feeacc41f253.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/nevovumowa/lofol.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/android_xmlpullparser_cdata_example.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/abc_song_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/56302276733.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/pevapukatonolitugebinelix.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001788e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1788E 5696 bytes
SHA-256: ce0ea05ec8d977ff13c79fd0931f9a68dcf4cba77d771771df9c60fb1b9fde06
font_01_sfnt_off00018bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BC9 16332 bytes
SHA-256: bb8e813ba38cb536c3ce2cbbd444939fb8fdb07cf6492f6d3a3fa57d5a2a553d

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