Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8ac0100db588f8…

MALICIOUS

PDF

76.1 KB Created: 2021-03-20 17:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ba4429f2f8714ded0f30b2788847e26 SHA-1: 22bd17d21730c5657bb98108eae5f37131a8da2b SHA-256: 6e8ac0100db588f87107b2a07abc03bad26240d05e2a70612b6c49020b680204
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier and ClamAV both flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs likely lead to malicious content or phishing pages.

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://kuzutuzo.ru/wix?keyword=maytag+atlantis+dryer+mde6400ayw+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fff6147f2216.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/kadosupixufubijoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454168/normal_5fe4b25f2e507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_604d5c4d08879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_5fe18990501f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_600118b147afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_60361276a7d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5fdfdbce08af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_6039bfd7ea2de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475397/normal_6017bf864c1fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemovimuwopete.atwebpages.com/nerasizukudojafawisepoto.pdfIn PDF document text
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_96d9feffa01d4a3fb0b28070478c2d14.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_970b8a4a8a1a4f59984d88e6759f7348.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_0e4a6b3730594488bde950ebb2b5fe2c.pdf?index=trueIn PDF document text
    • http://gisoxurosi.epizy.com/45724699842.pdfIn PDF document text
    • http://limufij.myartsonline.com/effects_of_weeds_on_crop_production.pdfIn PDF document text
    • http://notijukigexu.rf.gd/carolina_ale_house_drink_menu.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/poliweponibakoforavojigas.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_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 5728 bytes
SHA-256: 80d5c2f5383dfa17cd91bea40e277d3473108e49827e186677a2b19150e74b09
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 10616 bytes
SHA-256: d997354fac88359373728d16ea83d6ad9785f5556ebbd69c23a16b3b838a59c6

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