Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e3db7eacfc3b95…

MALICIOUS

PDF

78.0 KB Created: 2021-07-12 21:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b5cbe8dfa55287273b7993158f5321c SHA-1: 6cfb3f8ee16dbca975af2715cde287808fa83b84 SHA-256: 89e3db7eacfc3b95e91c6a66458503a3646813fbfc9f3d057c0969274a1dcc07
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 phishing or trojan threat. It contains embedded URLs that likely lead to malicious content or further infection vectors. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into navigating to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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://feedproxy.google.com/~r/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=books+for+first+year+nursing+students+pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e782be501d0d207148614f/1625785022530/muzavipurasarerokawozuf.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ded5c244202458ae963/1626111469336/another_rock_n_roll_christmas.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec76fbad1bf7105cca91ac/1626109691369/supitemutono.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec78f7288cf71862a8789b/1626110199791/30885673182.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93a411448b0619849408e/1625897537220/additive_identity_of_real_numbers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e821bd5eabb22f35dd5ca6/1625825726236/womuz.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e83fff9e539748b1190005/1625833472043/i_want_to_know_you_lord_you_are_a_great_big_god.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_off0000cecf.bin
d3160633d936d01ea872df9ee11c97749f2cdda119c626915749943c3ea4918a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCECF 16572 bytes
font_01_sfnt_off0000f9fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 16792 bytes
font_02_sfnt_off00011215.bin
e0ba93f8ae3e3b830949201f35fbc8f89a0e95758537cc023cca457d85a62069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 10988 bytes

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