Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dab402479446b4…

MALICIOUS

PDF

73.8 KB Created: 2021-02-03 07:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bf98d1515feca18574c32dff36b4f702 SHA-1: 252c3e130beea23d4094712f695990c8e31cc94e SHA-256: 32dab402479446b4c3896d0781f74465bbe08763f68b4f53f3cd64138c4bb37a
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URLs are likely part of a campaign to redirect users to malicious websites.

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/aws?utm_term=prevent+duplicate+entries+in+excel+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff770cbd1143.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/nojop_tokulagix_jefirun_mexur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5feb4a6848df9.pdfIn PDF document text
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/rafiwebagijik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426547/normal_5feec3bf34b8c.pdfIn PDF document text
    • https://wamurereleveti.weebly.com/uploads/1/3/5/3/135392703/zokofaboroditetuso.pdfIn PDF document text
    • https://gaxuzuwe.weebly.com/uploads/1/3/1/8/131871814/6691319.pdfIn PDF document text
    • https://pejejuwefosewa.weebly.com/uploads/1/3/4/0/134040570/rikixifad.pdfIn PDF document text
    • https://www.contextures.com/xlDataValIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/reciprocal_pronouns_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/rotunewevukezikuluram.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/42292478047.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/nimumiganoritupaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/12902483883.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/pubojinifawawufodosamif.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_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 5292 bytes
SHA-256: 85c98eb059e2e57c7536648535f4341d126ab509a3a882225a317ecdad5c310d
font_01_sfnt_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 10728 bytes
SHA-256: 67fab45c0fecec53e3696b5edee4f35936c890b93f5b52a70e02ae51d5356043

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