Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1f68c3a19a2d12…

MALICIOUS

PDF

72.7 KB Created: 2021-04-08 00:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9426e08f4f55c395dcc8d85e82b15dc4 SHA-1: 74399d72664d0ac970401926fa2a92fcc3cc3812 SHA-256: cd1f68c3a19a2d121ea1bc81679ddfd56c3b1c19589cc28e1f35d0e5f01bccc5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be part of a lure for a chainsaw sale. While no scripts were explicitly extracted, the nature of PDF malware often involves embedded JavaScript to facilitate malicious actions, such as redirecting users to phishing sites.

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://ponafet.ru/strik?utm_term=stihl+ms+180+c-be+chainsaw+for+sale
    • https://cdn.sqhk.co/gixedomawa/jOieif0/guess_the_movie_game_answers_level_5.pdf
    • https://kigokowolabewal.weebly.com/uploads/1/3/4/1/134132594/e5098.pdf
    • http://tuwujunosemep.iblogger.org/basic_interview_questions_for_civil_engineering.pdf
    • https://cdn.sqhk.co/nivodoruw/jg2ly8V/ios_10_launcher_apk_free_download.pdf
    • https://cdn.sqhk.co/xumesapaxoku/fgc0hgi/fake_razor_prank.pdf
    • http://biribekagupelu.66ghz.com/nibubanukegijexibasaparow.pdf
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/a0f94b165f049fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_3b2c4ad50a7347fe8a8002b62c3fcfcf.pdf?index=true
    • http://lekowezitodog.rf.gd/93616006751.pdf
    • https://uploads.strikinglycdn.com/files/18833ce1-9746-4e8b-a78c-f5efd427560f/zugixuzet.pdf
    • https://uploads.strikinglycdn.com/files/3093634c-ca3d-41ab-a13a-ceb014606c5e/wow_classic_system_requirements_2020.pdf
    • https://uploads.strikinglycdn.com/files/d82e1c9f-0602-4432-a0aa-72323fb222ff/flowers_for_algernon_book.pdf
    • https://uploads.strikinglycdn.com/files/0bc3c856-1542-47a9-8833-7895cb786b97/23539789185.pdf
    • http://vagakidid.epizy.com/zirefelusetelunobakuris.pdf
    • http://gigoxasogoteje.epizy.com/garmin_810_vs_530.pdf
    • http://joluluseliwawi.rf.gd/78990096626.pdf
    • https://uploads.strikinglycdn.com/files/64294e2b-9ad4-4f52-8e50-2f51a611df72/what_is_meant_by_quality_in_project_management.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_e9ea2c41f7664241ad18963c5e70df06.pdf?index=true
    • http://dimazobuxijema.epizy.com/organic_chemistry_notes_class_12_free_download.pdf
    • http://jefuxizimume.rf.gd/vifukutevulupe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce24.bin
f0a2f15f72fe8177021c05df07370aa4a1269cf4a14d4eb478a8ed8ed10efb1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 5664 bytes
font_01_sfnt_off0000e154.bin
b4e70e1c39682f938369253e8a6607d7884380f19a6fb68feb3cd9a8fa7018ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 11260 bytes
font_02_sfnt_off000107a5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 4324 bytes

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