Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf06c86b99d01bcb…

MALICIOUS

PDF

178.0 KB Created: 2021-07-14 02:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16c8892081666a87363416f0f2a0c53a SHA-1: 025d17c8f8827b9f1c09a51c0a83d65643193dff SHA-256: bf06c86b99d01bcb9d86731622f274da4071da88ab000d11da2e9c38baf8e176
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. The presence of external URIs suggests it may be used to download a secondary payload or redirect users to a phishing site. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9556

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/~3/4aHNpQc2m6I/square?utm_term=jesus+preached+repentance
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77a4ac9fd751cf92b10f4/1625782858433/81024083228.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e875756b13e67beb16bf6c/1625847157748/kokodavobov.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7eb0d9bae382bbac0290d/1625811725406/35474254190.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcf1a6f118478735a74a8/1626197786622/sozeneb.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed963e5860d606f481b9f1/1626183230929/android_1_com_hill_racing.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f7022dabf27235526866/1625880322836/unsecure_online.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94f09309bd63f3d876b2a/1625902857901/praise_the_lord_to_god_be_the_glory_lyrics.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ede6876d720f75fb61739c/1626203784058/sound_of_raindrops_in_words.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1d344d490f67274f6ad2/1626217780609/fobirevegadex.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_off00024ba0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BA0 16792 bytes
font_01_sfnt_off000263b2.bin
8a17592557e0112e3ad5059900def0fa6bc642592d8d95244516ec3b7337a801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x263B2 28500 bytes
font_02_sfnt_off0002a24a.bin
cfedbdac95441ae3ac6b36c3e05b52f4a325aeebe4d189b900d882cbaecffedb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A24A 10444 bytes

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