Malicious PDF — malware analysis report

Static analysis result for SHA-256 448a5a899a14f78e…

MALICIOUS

PDF

81.4 KB Created: 2021-07-14 04:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d949210bcaa6b31c03e3703389918b72 SHA-1: 28e46dee3420cdcdb31ac2feece6b10d9c8fcf8f SHA-256: 448a5a899a14f78e4d70af27843663f013cf21db97c3e7dff0843665af517401
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://philabc.ru/square?utm_term=workhouses+and+the+poor+law', which is the primary indicator of malicious intent. The PDF structure and embedded objects do not reveal specific scripting, but the presence of an external URI strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/square?utm_term=workhouses+and+the+poor+law
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0df164675e3b9ddd8ef0/1626213873734/vodiwirazo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec793912c1416d2f19b3f6/1626110265239/3_bug_bites_in_a_row.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec94297a6a16267649fc95/1626117161510/to_wind_up_a_toy.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8417f89f8e700bf770d6/1626113047955/projectile_motion_practical.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee06d1cb43530604ac5e4f/1626212049131/tom_and_jerry_animated_movies_list.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81e7546a8e17713e759ac/1625824885199/72487260455.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee073c2e8a4a2aca7e89a4/1626212156573/54849950206.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edecebc450ee473080afcc/1626205419795/how_to_take_sharpie_off_metal.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c139872c4c6263c3bab2/1625801018075/dry_rub_for_chicken_wings_air_fryer.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93837dc7460dd09c1ccc/1626116995722/negexuwevi.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_off0000dcb2.bin
7171c8972768c779174333bb9ceee901cd4b4f6c5ac46acdbf0ad9c693d580d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 10668 bytes
font_01_sfnt_off0000f535.bin
3a900a2f1e2119d691373acd989a6a4be514ab0d8322da4f80ef71946783c741
pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 16968 bytes
font_02_sfnt_off000121a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 16792 bytes