Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b453d045704889…

MALICIOUS

PDF

84.3 KB Created: 2021-07-17 15:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6bf1dbe112a8e1a2e812e5c604d91394 SHA-1: 46acbdd6c9b76ce9bb7b41db0f109e4e2c4f9767 SHA-256: a9b453d0457048897f036566e0ddef1656c467fb8f9e5db8ca61afdae5d6aba3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload. No scripts were extracted from this sample, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=check+mark+in+powerpoint+2016
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e5a98915684aa539ebc9/1625875882017/jegov.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede119ac614e13d130267c/1626202393653/talk_about_with.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8edc8025aa46e30d058a5/1625877960298/summary_of_text_online.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8426e85181504630b87df/1625834094977/69793259862.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee3ca139b82603386a16e5/1626225826057/cupric_sulphate_and_copper_sulphate.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca82df9183728738a4251/1626122285952/lawitixejoxone.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1efa33d4654651bb120b/1626218235096/46851583189.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee7c9364675e3b9de4deda/1626242195209/pudendal_nerve_pain_causes.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0428a54c38e1eb64aec5b/1626358410322/hot_flashes_during_period_in_40s.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2545526e2e727c256f666/1626494037672/closed_nondisplaced_fracture_of_styloid_process_of_left_ulna_icd_10.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecab8e77250868137097a3/1626123150377/wozogekopefeni.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f20e698cfcbd015c11d115/1626476137444/cbse_class_10_maths_exercise_14.3_solutions.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c674.bin
b5fcfcf885b6cb86adec650655203fe0573ab3ef9cb4210390a5ddb45ec804fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 11096 bytes
font_01_sfnt_off0000e03b.bin
64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 16060 bytes
font_02_sfnt_off0000f54c.bin
651c963e66def4974581622de3774d6095d1200899a535cf7d6eefb0c82540c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 21032 bytes
font_03_sfnt_off00012a29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A29 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.