Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a39712e80f8b084…

MALICIOUS

PDF

80.8 KB Created: 2020-12-02 17:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89f24ef6f2c95c706a8016248861f8ff SHA-1: 1a0b0a495223fb9923291652c045a71b31c76b59 SHA-256: 5a39712e80f8b084e9b8eac2667657dbbe1987685b4ce7d2ab3fee613ad348bb
96 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely for credential harvesting or further malware delivery. The PDF structure itself does not contain readable content, but the presence of external URI and the ML/ClamAV detections strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=affymetrix+usb+4+paraformaldehyde+in+pbs
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8a7c5110b12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxadol/63787526787.pdf
    • https://s3.amazonaws.com/tokafanawa/38419092117.pdf
    • https://s3.amazonaws.com/rekibedafowow/ragesopowurakatonaj.pdf
    • https://s3.amazonaws.com/dalava/warranty_solutions_gap_cancellation_form.pdf
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc2d6ad9ee0f32b87b1972c/1606604461880/95247630322.pdf
    • https://s3.amazonaws.com/gotijejaj/bordereau_report_example.pdf
    • https://s3.amazonaws.com/zatazewoz/91735782431.pdf
    • https://s3.amazonaws.com/gewuwasi/stealth_hawk_antenna_gain.pdf
    • https://s3.amazonaws.com/medaliwifufugel/bogok.pdf
    • https://s3.amazonaws.com/gewisetug/everest_1996_anatoli_boukreev.pdf
    • https://s3.amazonaws.com/leguvefu/62958750637.pdf
    • https://static1.squarespace.com/static/5fc28553bda9c57a97c873ab/t/5fc6bda1bfb90028be398122/1606860193347/71664561351.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ff.bin
2fb1e1598fb10d0626f11ebdb18da8a1f898701cdcedd99399cb785f1ae13619		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 5668 bytes
font_01_sfnt_off0001082d.bin
0ffc6e70868747d7240b4b2fe7f3dcd43a59417c547726b593b9088bf5fa0396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 14532 bytes

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