Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a16735ca780833…

MALICIOUS

PDF

84.5 KB Created: 2021-07-19 04:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 004d7123797c622331b3b983761ea517 SHA-1: 4bdf8c2f33017d3ab1e043a96f49d67dea03339b SHA-256: a0a16735ca78083359fb68144da45247fcd25167f62fc1ea8200287ec9292d82
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that are likely used to redirect users to malicious sites. The presence of PDF_URI and EMBEDDED_URL heuristics indicates an attempt to leverage external links, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=chapter+4+active+reading+guide+a+tour+of+the+cell
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e90afb2f3c4128e1895572/1625885436079/tubidy_music_download_mobile.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8b121bfade41bb3162819/1625862434042/94528755131.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0803fc358bb4476083908/1626374208017/kaxomusezurixobetevekafo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e952c283ae0c49023a9377/1625903810738/gafevesufagubuwolodigir.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_off0000e7d3.bin
f02f30f74fd1e9b29234278b3763a366f65f6cdde53f52bb2240d477ade29e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D3 17060 bytes
font_01_sfnt_off00011467.bin
29289cf16119383da453593dea210a22f60865ea46bfa5bfd4e78e61285b52f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 11008 bytes
font_02_sfnt_off00012dcb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCB 16792 bytes

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