Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6450fd05d77272…

MALICIOUS

PDF

86.2 KB Created: 2021-04-08 02:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ff3106f5d267de6414cb450f28e4d887 SHA-1: 5b5e36d760bb0cac52e1be5bf6e7a46ccd6fc118 SHA-256: be6450fd05d77272b60e51ece78aa95fe6a1b230b5f9d3ed5a2f825a0e636128
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=gluten+free+treats+for+toddlers PDF link annotation
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/tilatotogile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_606d437a8dac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366003/normal_5fedf3c21b479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_6049c0fc85146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_602f93027ed43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fe8dcd22c590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_606b5bad7de97.pdfIn PDF document text
    • https://vukojudal.weebly.com/uploads/1/3/5/3/135317211/sirepubetot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5ff8ee7a32af0.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/kobivimelelo/tuniwivinawubav.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/suromudinurobomif.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/34016744622.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/gebemerawabev.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_1d289bd6b90a4c8db648e0babbf2ef88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/lowewat.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/55195114747.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/50362275310.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_4a6905928b1944c08b13bc222f3a776b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/the_undoing_review_metacritic.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_off00011566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11566 4932 bytes
SHA-256: 218e34fbe174111939cdae04b5fb0e1a741e683d738429251cc53c0ef18e6389
font_01_sfnt_off0001263a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263A 10908 bytes
SHA-256: 0f7f6b658ad376ba38948d20d6df4fce2c46fd9ab2122f7aad946755eb5e92b4

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