Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfef5bde5c071686…

MALICIOUS

PDF

68.3 KB Created: 2020-12-04 21:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dc532fd96bc58780f44e6d5397e013ab SHA-1: 16d3df1bfa19b832a2a7304a2d886343b49e94f5 SHA-256: dfef5bde5c071686674ff86e911a68de7d684403a137737e48c64087c92ea8f4
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious URL, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to job applications or resume points, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=tableau+resume+points PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5fbfaa989a931.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/zemufufelelo.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/mokuwanibof/komplikasi_marasmus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ccd688c99b6d37b395bd/t/5fc9942e1a258d244fd77cac/1607046194633/mascot_dunks_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1cdc5e198d0a3864d3d2/1606229215811/61276908496.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rakidabefe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106a17848ba205d193829/t/5fc1b1919d79364840cd6321/1606529425808/unit_13_ps_vita_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0ea04e-cff7-4854-ae41-4e6615ccbf68/55708970767.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_off0000cf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF70 5052 bytes
SHA-256: 92bb587d8f92d829c73504d790d0a6c5d8a2c2be764e829f70858b23923f7d66
font_01_sfnt_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 10772 bytes
SHA-256: 84edbb1eeea39c6112454bf541375d768a22e9820da18a47f34c984ef5a2b624

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