Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29449d839cf7ede…

MALICIOUS

PDF

99.6 KB Created: 2021-07-21 08:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dea43784dd80e2effa605e531ef700fc SHA-1: d74fb81355bfed9b44f91bf4a89f156aa1419ef7 SHA-256: d29449d839cf7ede4c5dac9b7de789df33003e18320b0668c41c758e6f41c554
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user or download further payloads. The file's structure also shows duplicate object bodies, which can be a technique used in obfuscation or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/~3/7R6buoffwiA/square?utm_term=which+is+the+longest+word+in+english
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9971bc6eee4b059027a6/1626118513990/wrong_turn_5_movie_online_watch.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6f7b6d75c50a5d46ec8b/1626238843575/minecraft_java_edition_android_launcher.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8f43c32416487af064cb/1626115907944/nuxarotaf.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5d5f92d024e2ad72e6402/1626723833077/wimabev.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec90db4f558d0bf39cd5d9/1626116315342/compliance_in_english.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93ed4025aa46e30d3ce81/1625898708743/pizza_city_game.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f739cc51711a51b42c02d4/1626814924512/7641472526.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f77c2a6f785f58328bb6/1625880445016/machine_learning_master_thesis.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f26c5b36db64625196f5bb/1626500187954/how_to_edit_in_chromebook.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6d72b1f8b9564888b948/1626238322444/determine_the_force_that_the_smooth_roller_c_exerts_on_member_ab.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_off000121b2.bin
fedc4b94d89353082c9b586d28a617766e63368fd14170170e181c15f5f983c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x121B2 10568 bytes
font_01_sfnt_off0001399f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1399F 16792 bytes
font_02_sfnt_off000151b1.bin
47596876d59b69fbb13c87e958da17acde4ed4a62644a51e693cfd51cb328b12
pdf-font-stream PDF embedded font (sfnt) at offset 0x151B1 18172 bytes