Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb5f62d22f5193e…

MALICIOUS

PDF

68.4 KB Created: 2021-07-17 13:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7f64667ee6b2288270d0e26cbd997a3 SHA-1: 1cc251a7426808a2515f469bf1e0dade464847c6 SHA-256: deb5f62d22f5193e8981e8003dfb8f127ee79bcc0191eeedb265089784d231f0
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its structure, containing an image that likely conceals a clickable element. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/AG-UZpNbJGc/square?utm_term=scp+682+scp+053
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f099cc9882a91faebdda49/1626380748772/82217940126.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f24bc14b68c137e69173dd/1626491841209/makaton_sign_for_sorry.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92287320dbd0de2810c43/1625891464059/jewuvegudabojosoraw.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1331114e6b7b7de3a966/1626215217261/41008533998.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_off0000b3da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DA 16792 bytes
font_01_sfnt_off0000cbf1.bin
450511af5d156354b3f8423d85ec4061e2e9404f6f785977ef29152704dbf556		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF1 10512 bytes
font_02_sfnt_off0000e3ec.bin
b054aef2bb88cfd7c9f9daf97d9c52756fba33e0cdeb942c137963237afbd0fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 13804 bytes

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