Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf95d8e3b59b6c1…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 17:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9925b0d286909db30e5ba7905eef9509 SHA-1: 9941552e6d521d78a12cc5575ee1f0b837600295 SHA-256: dbf95d8e3b59b6c15538000ecccbbd78ae3fbebbeed788b16771ab0046676309
136 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high heuristic score for password-protected archive lures. The embedded URL points to a domain associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may leverage embedded JavaScript for malicious actions, such as initiating downloads or redirecting the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/123?utm_term=chrysler+town+and+country+2010+manual
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/jixigijeb-zafapanubosir.pdf
    • http://gouliwer.online/ielts_general_training_writing_task_1_tipsnejfb.pdf
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fd289c6d2196.pdf
    • http://top-odejda.com/power_robert_greene_espaolkc9vo.pdf
    • https://static.s123-cdn-static.com/uploads/4469850/normal_5fddae1299678.pdf
    • https://cdn-cms.f-static.net/uploads/4417824/normal_604d1dd602c26.pdf
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/3dfe41824f.pdf
    • http://buloshnaya.site/lidatawawozezod4422m.pdf
    • https://static.s123-cdn-static.com/uploads/4374022/normal_6004b196b5c72.pdf
    • https://static.s123-cdn-static.com/uploads/4488336/normal_5ff0348b629f6.pdf
    • http://servempieza.site/marketplace_foods_minot_nd_jobsokptb.pdf
    • http://lujefepoma.iblogger.org/difficult_airway_society_guidelines_ppt.pdf
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5feb8dd8e26bc.pdf
    • https://fatomomome.weebly.com/uploads/1/3/1/6/131606630/4461556.pdf
    • https://cdn-cms.f-static.net/uploads/4448539/normal_603e3cc20c1bc.pdf
    • http://tetutunugu.iblogger.org/34696103670.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://remokulepene.rf.gd/what_does_a_missile_technician_do_in_the_navy.pdf
    • https://uploads.strikinglycdn.com/files/648c1e17-4875-43b7-9bee-853f4b24598c/gakepizezigevewuxejux.pdf
    • https://uploads.strikinglycdn.com/files/b5a839c5-8814-4683-b773-d9673d5f29db/biology_chapter_13_assessment_answers.pdf
    • https://uploads.strikinglycdn.com/files/25c8b723-c53d-4653-b08b-dc797d6f40a3/uppababy_vista_stroller_price.pdf
    • http://kegipufi.rf.gd/happy_birthday_video_song_tinyjuke.pdf
    • https://uploads.strikinglycdn.com/files/552bb58d-0277-4eee-b6a1-5e8f83d31419/what_are_the_requirements_to_avail_sss_maternity_benefits.pdf
    • http://kibululugavi.epizy.com/vomalawipuvumiluxumeburos.pdf
    • https://uploads.strikinglycdn.com/files/601d40ba-2ae2-48b9-b645-fbaf3544a64d/roginiwajofe.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_off0000f929.bin
5fe8c0c2f91c06908c0c93634a79d14ef9794b81e277fcd40628ed450b77685c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 5604 bytes
font_01_sfnt_off00010c1f.bin
11ea88431dc8dc59705c3767990e936103e3faa22fba0b8937253751665532c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 11924 bytes

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