Malicious PDF — malware analysis report

Static analysis result for SHA-256 f115b66728aeddbf…

MALICIOUS

PDF

78.3 KB Created: 2021-07-16 17:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95e4903b7a96fe4183f31ae2ae0f6cfc SHA-1: 9a275b1969a626c52d368e1f96524738ca8de19b SHA-256: f115b66728aeddbf08483781f6a4f996000aff1c6f79745948351ac9c7de4b79
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple detection engines, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or malicious redirection attempt. The ML classifier's high score further supports its malicious nature, likely as a trojan designed to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/nCRFBnYrBHY/square?utm_term=alcohol+in+water
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9bf91d0b393375532837/1626119161875/for_and_since_worksheets.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ca1ec30d520a44510a53/1625868830122/cs_executive_scanner_for_june_2021.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee89aae7148d06bc74f4a3/1626245546173/demomemebomewevid.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d86d81ab8d1aa9deef1d/1625806957607/sketchbook_ideas_cover.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efcb57874a183f1c3e8483/1626327895574/1540623278.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e863d95dde534c8578e251/1625842649761/arihant_chapter_wise_jee_mains.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8b0a40121f56689ab3e5/1626114826803/protein_denaturation_is_due_to.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f10585c825a553dff3314c/1626408325634/difference_between_similar_and_congruent_triangles.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7cf019a16f038d619f6d/1626111216299/what_does_free_message_blocking_mean.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec794b7e2b6271615a5f04/1626110283613/get_marker_out_of_fabric.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd0694c056a31b8199a85/1626198121397/32443423996.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_off0000d438.bin
9abca17fb12418882cd97e50e73079c8377a9f90f6783a977956dcb6862c8a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD438 10228 bytes
font_01_sfnt_off0000eb2c.bin
68e08a911880e7cb935010c1cf8e9e9eaa29c684b1fe741c4e6f70526b3bb829		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 16200 bytes
font_02_sfnt_off0001153b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1153B 16792 bytes

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