Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c39e26cacc83b0…

MALICIOUS

PDF

75.9 KB Created: 2021-05-11 02:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0309add92d155f1ab53f909ada2e2eb SHA-1: 24e64018a176fcad9ed102c46a6c2f6dc66951fc SHA-256: 29c39e26cacc83b0f3dff09130b47f9b05abf8a0c0bf7e5eda0205c4c552d545
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=google+maps+api+simple
    • https://cdn.sqhk.co/kugefiruxat/CKfzihd/transformers_forged_to_fight_bots.pdf
    • https://cdn.sqhk.co/lojibuwe/aico0yS/20730649955.pdf
    • https://cdn.sqhk.co/lilodipu/Rtegeid/smart_switch_android_download.pdf
    • http://dozibasiwoman.iblogger.org/the_history_of_photography_book.pdf
    • http://creditscorecard.info/kindle_keyboard_reset_to_factory_defaults6vznh.pdf
    • http://fastcreditcheck.info/80079761404kun0h.pdf
    • http://kawonipedo.22web.org/97073810885.pdf
    • http://salea.site/fozorikaxokunusuxajal656ch.pdf
    • https://cdn.sqhk.co/ronuwimo/fjij1p2/ocotillo_wells_thanksgiving_2020.pdf
    • https://cdn.sqhk.co/ripalufix/agdUjgj/58280962890.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd94bab5-df67-48bd-a32a-7be83acfbc7a/69100407200.pdf
    • https://uploads.strikinglycdn.com/files/c03c13a5-99d6-4dc1-b9b9-448573b0b202/89673512409.pdf
    • https://uploads.strikinglycdn.com/files/98f95cc4-ba50-46cb-b290-4c4502fed02f/2006_ford_e350_service_rsc_now.pdf
    • https://uploads.strikinglycdn.com/files/13a65a92-3b22-4090-8658-6be400caa582/taco_bell_spicy_tostada_nutrition_facts.pdf
    • https://uploads.strikinglycdn.com/files/72a6409b-fde5-4e40-afe4-b08a1d5bec8b/zosigujagotapetedawilifow.pdf
    • http://liwununigu.epizy.com/58614795894.pdf
    • http://jokipuzovorije.epizy.com/define_yourself_answers.pdf
    • https://uploads.strikinglycdn.com/files/cfebdf52-403d-4ec7-bb56-d0189f78cfff/why_discipline_is_freedom.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e944.bin
d5c3752c5809e1de18a47c6f2cc11a93085decf90b4c23ebdff75781f7a86486
pdf-font-stream PDF embedded font (sfnt) at offset 0xE944 5076 bytes
font_01_sfnt_off0000fa7b.bin
6eb08e78d7e3d8b97990f820fac852fd756554b623816eb8a1286e140b2cb9b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 11844 bytes