Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a4ea326b15639f…

MALICIOUS

PDF

78.9 KB Created: 2021-01-01 00:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61f0aa03264d6e4a6e6aecd5d0bc60ad SHA-1: 1d3ccd14864243c2a9217d52308c1ffc3502bdb1 SHA-256: f8a4ea326b15639f21ef21af64767221124d19aceba09d8ea7da4771c4918a54
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains a link to `ggtraff.ru`, which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Primal legends download pc', suggesting a lure for users interested in game downloads. The presence of embedded URLs and the overall detection by ClamAV as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=primal+legends+download+pc
    • https://cdn.sqhk.co/zubuwebofe/YYsTEzB/66679718816.pdf
    • https://cdn.sqhk.co/retepisej/ghqgfjj/pew_pew_pew_lasers_iphone.pdf
    • https://cdn.sqhk.co/nuwobevina/J7ogcvo/tijowi.pdf
    • https://static.s123-cdn-static.com/uploads/4409103/normal_5feb3b0234871.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f33d0a71-b6b5-4f78-be83-57dfc9647656/fezuxibos.pdf
    • https://uploads.strikinglycdn.com/files/408192ce-6bfc-4f08-86d7-5dddbca0f6f6/nowopunejibejevusubat.pdf
    • https://s3.amazonaws.com/xuvamuba/bsnl_bill_postpaid.pdf
    • https://uploads.strikinglycdn.com/files/c1139dfa-98c1-43af-b1d9-ebbdb428678a/32895701683.pdf
    • https://s3.amazonaws.com/nigimul/67084489400.pdf
    • https://s3.amazonaws.com/wujixus/ligidagobavuduxapix.pdf
    • https://uploads.strikinglycdn.com/files/10ad8205-e2c0-4dc7-a6e0-b0ee832ae2f7/buvasamisotisipowekaz.pdf
    • https://uploads.strikinglycdn.com/files/518b2dd9-41d8-4811-994e-abb8139c4071/xomibarape.pdf
    • https://uploads.strikinglycdn.com/files/d08e680d-6bb4-4902-83b4-e53278040571/potiwokedexemikis.pdf
    • https://s3.amazonaws.com/pazifetanegapu/82325215572.pdf
    • https://uploads.strikinglycdn.com/files/f1d691fa-25c0-4843-b255-4a59a4f449f1/37913220809.pdf
    • https://s3.amazonaws.com/kovezodepugov/gutuvedalepevi.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
    • 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_off0000dde3.bin
dfede940fc0d72f62501e338e22fbc9cddf152c21a573b39880c6f3d2e8ea239		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 5488 bytes
font_01_sfnt_off0000f086.bin
c84fa0e1c42ccc0ca420c95d73d51c41c7f67980f290b4d469920be305af66d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 10444 bytes
font_02_sfnt_off0001147a.bin
023a890f2bb733df92d06c668ca64371c9ed88f0cbc5fabbeda83f3d20e40b02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 17392 bytes

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