Malicious PDF — malware analysis report

Static analysis result for SHA-256 7271869392b59186…

MALICIOUS

PDF

77.3 KB Created: 2021-07-13 18:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 908f12d77805fcffd77302972ba97ffb SHA-1: df32a8a39c2a9ea0150ef1edc22445b49eee1bd4 SHA-256: 7271869392b591862c7e5c5489bc9eabfb74fba393147485a1851922ec8cafaf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or malware distribution vector, likely attempting to lure the user to a malicious site or download a secondary payload. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=exurb1a+the+fifth+science+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9bbfb2cb0e528689b859/1626184639364/deditejunipimoraketenusi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed2806840a1961e7b3b97f/1626155014609/street_fighter_2_unlock_characters.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca6847dc7460dd09e4199/1626121860962/driving_directions_to_stockton_california.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8eeb1cff58014d549aaa/1626115819648/combs_ditch_racehorse.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed1130f84adf285bee97a3/1626149168697/favififirubadebixapo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88fafa40056e74d2cdf2/1626114299022/how_to_answer_why_do_you_want_to_be_a_doctor.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_off0000c708.bin
b1bb8d1dfa559e00962da65e8c82420e897ed1e0c544db7592318589c6aac873		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 10928 bytes
font_01_sfnt_off0000e01d.bin
ec0d1e87ce42ab537e1330e8cb7db3bb2fdd25cbf82ca0ac71ad7eeceaeeed1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 19120 bytes
font_02_sfnt_off00010fda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 16792 bytes

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