Malicious PDF — malware analysis report

Static analysis result for SHA-256 576da65e95b9f3b4…

MALICIOUS

PDF

64.0 KB Created: 2020-11-10 08:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd6d71ea5591b86dfdf2ad1c86c323c SHA-1: d80caf4db30f8b8b8d887afbf85ae837968a3dfa SHA-256: 576da65e95b9f3b4f8dfe61ff3beb88e8631ff5d47158e1b9ca6b1682598a590
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a URL that appears to be a lure for downloading a manual, suggesting a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?keyword=model+wm+cs6004w+manual
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/3445560.pdf
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f971baaa78d5.pdf
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/gazavozatadarope.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fa7376d07e47.pdf
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/rirudarewir.pdf
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/9377103.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/2249666.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wiwamoxamo/nitikeresomogonenoziledo.pdf
    • https://s3.amazonaws.com/lurutopobi/bible_stories_for_teens_about_faith.pdf
    • https://uploads.strikinglycdn.com/files/aedb0ff9-66d0-44c3-a4d8-cf55835b2a9b/zafogusemupuk.pdf
    • https://s3.amazonaws.com/bupijila/62059979030.pdf
    • https://uploads.strikinglycdn.com/files/1ad01b36-ff3e-44a8-8ad2-bc8cc5f71cde/3316977951.pdf
    • https://s3.amazonaws.com/xokebore/78969820740.pdf
    • https://s3.amazonaws.com/vuzufexarevima/45744742351.pdf
    • https://s3.amazonaws.com/fekaduvopigab/remogiwofopudigemipu.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_off0000bad6.bin
74e0d71edebcbc509d110fe2690b35018c6ce0d1d7a5b62b29f85a860dfbbcd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD6 5472 bytes
font_01_sfnt_off0000cd7f.bin
4ab0879695662a08457cd4faf71fae287906ae6dfa1c44fcd87e6740e24f5ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 11252 bytes

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