Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22b5966be83db52…

MALICIOUS

PDF

70.9 KB Created: 2020-12-19 18:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 63412f5b3e3475d599bb3e3eae4a2adf SHA-1: 255c895262ae396061d860544296259d2ddfd364 SHA-256: f22b5966be83db526a7ae5c4c145371db47c359e6ed6170f63059e66987b1493
136 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with a high heuristic score for password-protected archive lures. The embedded URL points to a suspicious domain, likely intended to trick the user into downloading a malicious payload disguised as a game trainer. While no scripts were directly extracted, the PDF structure and the presence of external URLs suggest an attempt to deliver a secondary payload, possibly via JavaScript execution within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafftec.ru/aws?utm_term=dead+space+3+trainer+pc PDF link annotation
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/8629969.pdfIn PDF document text
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/notakeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5fd88bbdcaa48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f97483c644ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5fae1a6ae43d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_5fdc1793f04c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff4672f8b574a0f3c747/1606221639509/temperature_in_standing_rock_north_dakota_protest.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/gun_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/jinakawigojefajadobuwite.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/3516062614.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/apple_ipad_pro_ram_size.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/40007473403.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 5196 bytes
SHA-256: b1ecc517aad8bca6df6c269332727e915b7c3703ba6c4bd067efc9c380782299
font_01_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 15080 bytes
SHA-256: c1724ce141d5aaad20337378b9270d3b216cc2c2de5c3e9a9070d79d1064df9b

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