Malicious PDF — malware analysis report

Static analysis result for SHA-256 9107cf08a98151b1…

MALICIOUS

PDF

135.7 KB Created: 2021-07-23 06:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 760aea08a4e08217a7fedd53bc08e829 SHA-1: a116cc2a1e0d7494111b08bb82c5b8b53bdf0f33 SHA-256: 9107cf08a98151b1dd4c2cf353afcde7ac9afe44b0d1d62157183f753182d725
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The presence of embedded URLs, though many are confirmed benign, suggests a potential phishing or malware distribution vector. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=adolescent+health+issues
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f972525ad3337a4c54b568/1626960466252/hexagon_and_trapezoid.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f7b1cdf668a559cd9764f5/1626845645755/game_unboxing_reviews.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f081f2488f8042adae6139/1626374642502/xupazujelaror.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2b196d68f32259051ebbe/1626517910799/30397374557.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3855e730b252c881871e9/1626572126761/kexuzajebigodekip.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e78afedbb92d34f5a9ec24/1625787134171/tasowiler.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7af709ebc0053f314303f/1625796465012/46593362010.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6820a3fb69e7128f806c2/1626767882427/verb_in_russian.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f7216a090b9d5f8c60886d/1626808682911/99976724551.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc36f1c6c1a61d5224226/1626194799471/how_to_print_powerpoint_slides.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f99f90765b98307c22b825/1626972048459/kgf_production_house.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f27090ac77840235622e8e/1626501264768/rexufonewaxoruvisitifufak.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9063a92abcc18c4f4d30f/1625884218163/jomipumigusetesibogi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5aeb231000559e1bcc099/1626713778765/dekejufatabugo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e797188f757b1ac44d6aa6/1625790232911/21819739520.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1a0f850bc4a3364030c9a/1626448120912/jageboxelugitafutot.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_off0001b183.bin
a9041a8758fe09b1dbad68e3a780b9bb6fb1c84dba495827f7c3992708b755cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B183 18808 bytes
font_01_sfnt_off0001e230.bin
4a4777229053a680971c85e6aa83112a12a8ff83b03f49c5ace84645e05184fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E230 10448 bytes
font_02_sfnt_off0001f9d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9D9 16792 bytes

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