Malicious PDF — malware analysis report

Static analysis result for SHA-256 25178f97ff52e810…

MALICIOUS

PDF

79.7 KB Created: 2021-07-13 20:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5cc01b7ed4ef96afbfe13774b2b46e1 SHA-1: 0e3c0beb2503d99cd8de5cd7611c8e73ff8ee6df SHA-256: 25178f97ff52e810b5d156b0d367533429d509b8442e42c9b013fde723056a6e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was classified as malicious by an ML classifier and detected by ClamAV as a phishing trojan. It contains an embedded URI that points to a Google feedproxy, which in turn likely redirects to a malicious resource. The PDF structure and the nature of the detection suggest it's part of a phishing campaign aimed at delivering further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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://feedproxy.google.com/~r/sq/ugae/~3/kVSxLQpkboc/square?utm_term=billy+d+williams
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e88a1437eca442869a9955/1625852436389/69599838474.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e777d03e36424b2a7dbce8/1625782224389/learn_how_to_fly_2_hacked.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecdb9bf95b5524f94c086d/1626135451507/porudukifeku.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8915419e99f7242455102/1625854293052/concepts_of_physics_volume_2_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edaab2c2b60e0ed5b61909/1626188466926/kodavogexaz.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9250db630645a0ef78180/1625892109650/lhasa_apso_x_shih_tzu_for_sale.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90d04f492d21a0f6a1ad4/1625885956290/77112865298.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78a5760c9e2bcf41e387/1626110117970/51922110486.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d933.bin
4da31bbb5fc67caf8767612251f88f3d05c74c450b2d57cddb6f00fc07be1619		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 16672 bytes
font_01_sfnt_off0001048d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 16792 bytes
font_02_sfnt_off00011ca4.bin
bad54240cd8104ece1613bbdea759e568d631ef416b185bab46979341729ae79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA4 10108 bytes

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