Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c82c633f879f123…

MALICIOUS

PDF

77.9 KB Created: 2021-07-16 23:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac7b1235df486043d00989cee947092e SHA-1: 4f51f63554228b0433170c4f3ac556dc6bbf7070 SHA-256: 8c82c633f879f12323be227925195e48793c0b33700f98e59565b69dd23131e7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is flagged as suspicious by ClamAV and ML classifiers. While the document body is heavily obfuscated, the presence of these URLs suggests an attempt to redirect the user to a malicious site. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0' strongly indicates a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/sq/ugae/~3/4Ji06Fp1PxY/square?utm_term=1+2+irrational+number
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7c1878ad60325f0c4f462/1625801095404/if_god_is_with_us_who_can_be_against_us_niv.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8d228de2d3f601511844d/1625870889047/bloodborne_how_to_get_ritual_blood.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edceb2f6d8087912bcd315/1626197682525/high_speed_high_rise_ielts_reading_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec95c7973f9128ac6c7273/1626117575123/sexus.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_off0000ceeb.bin
f061076b19f279903513a0e7ad4c60ee26a6d7accef5c50f1ba2e19cba1ceb14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 17232 bytes
font_01_sfnt_off0000fc47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 16792 bytes
font_02_sfnt_off0001145e.bin
5f21a5abe97013f92bce23194962729a472afead848fb3e5f538ea0acf93cd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 10416 bytes

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