Malicious PDF — malware analysis report

Static analysis result for SHA-256 9511c886bd4cf83d…

MALICIOUS

PDF

211.5 KB Created: 2021-01-04 23:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 60f6f8f278d30b94460f3667a411a5dd SHA-1: b6e4daacadc479231e1300b946a8b5a7d9690784 SHA-256: 9511c886bd4cf83d15893f8e83bb1b44d56ad9e48d324042f29de0d00323a34b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://trafftec.ru/123?utm_term=pericardial+disease+guidelines+2015 PDF link annotation
    • https://cdn.sqhk.co/joxesinejag/giejagc/24433437425.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/lofunitipakuzebo.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/vukolowev-panowane-xizebo.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/fGQojct/jovizo.pdfIn PDF document text
    • https://manedubel.weebly.com/uploads/1/3/4/5/134587872/vivupotamowezu.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/kejoduzige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_5fadc7f047e38.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/e4af03ca96.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/cd9e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbfb82b-1ba5-4979-8e87-176e8fbe5507/69307052288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fde1b9-7cb1-4338-8b46-4ade80c00dec/vtech_cs6649_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d26ea96-6417-4da6-bfb4-6e70f68870b1/70652218478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef543f5-37ea-40ae-a9f6-0c9c7d0a03bd/stonewall_jackson_high_school_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8798abc3-9d9f-47cc-bdc4-e78c356ab820/vifafosepetijeraxo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E635 5556 bytes
SHA-256: 788e8009300c3d85405898d590e58a9b3130e3347e891c7dd36dd8cc43e9435a
font_01_sfnt_off0002f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F930 16312 bytes
SHA-256: d38cacef117121ea8135c190db3d3aeb1506c74c98ee3af21adbce37d3a5d00b
font_02_sfnt_off000329d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329D9 16148 bytes
SHA-256: aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080

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