Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e4619dcacf4550…

MALICIOUS

PDF

90.5 KB Created: 2021-03-21 08:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 531eb851f07afec95977a78a58cd414a SHA-1: ea2798f82f1931f8fb987e3c1b8857aebdcc3f07 SHA-256: 13e4619dcacf45508c48d3f4dba8cf66a6e6f4c91e8282a444452b0720a0cb93
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'monographs guide', likely intended to trick users into visiting the malicious URL for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=ff12+monographs+guide
    • http://tovarzone.ru/12523833772wvnsd.pdf
    • https://cdn.sqhk.co/xudogafu/lbh6RPR/65887890696.pdf
    • https://cdn.sqhk.co/majukedow/gh3d8jf/brisbane_broncos_membership_form.pdf
    • http://lulelege.iblogger.org/9187929841.pdf
    • https://cdn.sqhk.co/zenetofuma/euhjaM5/wheel_of_fortune_casino_slot_machine_for_sale.pdf
    • https://cdn.sqhk.co/potexunajo/jijcaOA/emulator_gba_2_apk.pdf
    • http://x-bionic.shop/bpm_analyser_freedope9.pdf
    • http://hookup157.online/9698161276vpk5p.pdf
    • https://cdn.sqhk.co/pazaxefuma/dhjjpvd/carpet_cleaning_machines_reviews_australia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mekamaxabojumoz.epizy.com/60768068585.pdf
    • http://jelolit.epizy.com/present_simple_exercises_esl_library.pdf
    • https://uploads.strikinglycdn.com/files/bb52ac8f-5959-44f9-a352-9ce59dec5189/how_to_share_a_memory_on_facebook_to_your_story.pdf
    • https://uploads.strikinglycdn.com/files/d1c5733a-8877-4d5e-b833-a07b6a4c174b/what_is_narrative_in_literature.pdf
    • https://uploads.strikinglycdn.com/files/fa87f41d-3ce9-46a4-983f-75d8858ab5c5/dymo_labelwriter_450_turbo_support.pdf
    • http://bunisanabasa.epizy.com/95145968233.pdf
    • https://uploads.strikinglycdn.com/files/ec1af639-19a9-4d1e-b96f-69c35a81a8b0/riwiwedilunu.pdf
    • https://uploads.strikinglycdn.com/files/f0773823-6e2a-431f-97f5-d8d34e46e9da/if_two_players_have_a_royal_flush_who_wins.pdf
    • https://uploads.strikinglycdn.com/files/152cea0e-b0f5-4fa9-a7ce-b0eb7d270cdd/brandy_norwood_net_worth.pdf
    • https://uploads.strikinglycdn.com/files/c3756193-467d-4b02-8d00-62123cdf4d8f/verikewoso.pdf
    • http://dokirapuxok.rf.gd/2014_chevy_spark_ls_manual.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://scripts.sil.org/OFL
    • 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_off00010fd4.bin
3fe4dbaa62d9c6bb4ce89376b193d8941a3ef552c97f35578af093a4cd742403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 5560 bytes
font_01_sfnt_off000122a2.bin
735f4938fda75df8216022bd29c20be5730f91a379d23bce05bb9c09c6128f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 10696 bytes
font_02_sfnt_off0001475e.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1475E 16092 bytes

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