Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1dfa1284124543…

MALICIOUS

PDF

82.2 KB Created: 2021-01-25 21:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c6941bfa8265314fc073213645ec098 SHA-1: e314fc97391ebe4226b6771d95058264993aad05 SHA-256: 8e1dfa1284124543a00960d846bcfe2c33f03eb4f8070319d5b6d7bb21a79d5d
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'traffmen.ru'. Another critical heuristic indicates a PDF link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=civil+rights+training+test+answers In PDF document text
    • https://cdn.sqhk.co/mixubiki/hhHfTwb/18500753615.pdfIn PDF document text
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/tadasojewajexitoj.pdfIn PDF document text
    • https://ferijadupegol.weebly.com/uploads/1/3/4/7/134705138/gadeforuj-tidimu-nitafupipifum.pdfIn PDF document text
    • https://wulaludotesi.weebly.com/uploads/1/3/0/9/130969185/8893005.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/bifzGie/79697277647.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/Bebibge/37597061573.pdfIn PDF document text
    • https://darizifipofoluw.weebly.com/uploads/1/3/2/8/132815181/lamevo-fofugo-pigobunusuxeris.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/widiku/google_duo_video_calling_app_for_android.pdfIn PDF document text
    • http://xofududegotu.epizy.com/apex_legends_free_origin.pdfIn PDF document text
    • http://wemiwapava.epizy.com/bosegaxizupixirezikoril.pdfIn PDF document text
    • http://xokutamewa.rf.gd/antineoplastik_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/fakajudinepaxujutadu.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/artificial_intelligence_tutorial_python.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/60543799172.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/xaropakexug.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/spider-_man_2002_video_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/optavia_vegetarian_guide.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/34465103608.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_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 5004 bytes
SHA-256: 6fd09d6a6edc40971f9fdeb664f0e2d62ff2eadcf23994fd3badaab64b9e4c89
font_01_sfnt_off000115be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BE 11016 bytes
SHA-256: 80f5f0b3867a6837fd3f5f86b09604434c54b06fd5da7c341e5009af475b374e

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