Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30aa9052ad696e7…

MALICIOUS

PDF

92.8 KB Created: 2021-07-13 19:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02779a8305b7234016b52ebb4ad5061b SHA-1: dbf262d6ebbbb675c55a6b557fd6328cc38d3973 SHA-256: c30aa9052ad696e7812f15f0de209fc57f0f63628aa9b3389618a1cf42556b7c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and the 'SE_LOLBIN_RUN_COMMAND' heuristic suggest the document is designed to trick the user into downloading or executing further malicious content. No scripts were extracted, but the overall pattern points to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/UZrB20b2Dcg/square?utm_term=father%27s+day+benediction
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7f25668ba31612b595f2/1626111782140/blowout_with_curls_at_the_end.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec87107e2b6271615bcaf5/1626113809088/what_is_the_third_form_of_verb.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e78bd84d2175279d0ea2d5/1625787352886/11523900904.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec85affe047727940be85e/1626113455947/62392672700.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d56ca15ec47e08186ab4/1625871724871/gotobisojutukimutosinukam.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec84f3dd2ac847ff7ec51d/1626113267979/shadow_of_the_tomb_raider_bikini_outfit.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b73aa3609a707baa4534/1625798458528/tom_and_jerry_movies_near_me.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed912293721672204cecd1/1626181922289/85558000777.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/
    • https://static1.squarespace.com/static/
    • 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_off00010993.bin
321fb3340f963ca6a61455724793919b3a1219e9b1711eb4a7cd1e4c6f7936cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 10684 bytes
font_01_sfnt_off00012216.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12216 16792 bytes
font_02_sfnt_off00013a28.bin
b2f0e0e3311037fa4b7ad974761bd874314228c849c0e027065bc7a8ded6c7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A28 17352 bytes

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