Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f05fac02a8c91f…

MALICIOUS

PDF

168.4 KB Created: 2021-07-16 22:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ec874f7703910790fc4565b79e27d2b SHA-1: e8e14a936adb1b1d9cd4809b59091ebf35fc2806 SHA-256: c6f05fac02a8c91f3dbd323e878cc3910622d96e42ada6378deea6158592127c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is a Google feedproxy URL that redirects to a PDF file, suggesting a potential phishing or malware distribution vector. No scripts were extracted, but the presence of embedded URLs and the ML detection strongly suggest a malicious document designed to trick users into navigating to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/kVSxLQpkboc/square?utm_term=the+future+of+mankind+by+bertrand+russell+pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eff17908697753172e653f/1626337657155/komodated.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f067ba62e978296c9c4f1d/1626367930554/watch_movies_and_series_apk.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e944c9fc46b150582920a4/1625900234028/tagokip.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f026ca6611482e0a9299bd/1626351306698/learning_a_new_language.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0731da05bd62f13dd5891/1626370845314/98840460497.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86162d939c806f71c43cc/1625842018427/97488434894.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78c95978cb5ccaa9b798/1626110153550/data_structures_and_algorithms_aho.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f009111c2a3138378eafb9/1626343697923/177540923.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee4da38e3fff2bd3c1ac23/1626230180408/pals_instructor_manual_free.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_off0002323b.bin
72ecccc9263c82694a583574fb8438be2da29a2b4699d67a00c28dd776e1185f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2323B 18400 bytes
font_01_sfnt_off00026165.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x26165 16792 bytes
font_02_sfnt_off0002797c.bin
e674063574318ca4f77cf00bdc19f481a0ce37f902808822811900611741c07a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2797C 11172 bytes