Malicious PDF — malware analysis report

Static analysis result for SHA-256 427c8646e174a431…

MALICIOUS

PDF

76.8 KB Created: 2021-03-26 15:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0112a24e2cf2b726f02219c97e7b241 SHA-1: 580f0f001934fbb6cf9ffe4a024063f4ef73edf5 SHA-256: 427c8646e174a4318d4d06018251bf7c19cdb853a53a5cb89c32a27938fd0993
96 Risk Score

Malware Insights

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

The PDF file 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 deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "Robotic hand design pdf".

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=robotic+hand+design+pdf
    • http://leomannapov.com/kideprhk16.pdf
    • https://cdn.sqhk.co/fakomuse/0Mihvgd/uba_mobile_banking_transfer_code.pdf
    • http://pukimupupe.22web.org/scrum_values.pdf
    • http://ravapusevuj.iblogger.org/robevoni.pdf
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5ffb83f2a90ac.pdf
    • https://cdn-cms.f-static.net/uploads/4477878/normal_60323e594d0c0.pdf
    • https://cdn-cms.f-static.net/uploads/4388614/normal_6053193743653.pdf
    • http://bio-ita.fun/call_detector_onlinevor04.pdf
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5fec13077371f.pdf
    • https://cdn.sqhk.co/xuxofidipo/jijihjb/32032846858.pdf
    • http://esclick.pro/which_of_the_following_are_weak_electrolytes_in_water_brainlyxm45o.pdf
    • https://cdn-cms.f-static.net/uploads/4493545/normal_6014c5ff28c86.pdf
    • http://bcpzonasegurape2-viabcp.com/broken_sword_2_smoking_mirror_remastered_walkthroughz6k4n.pdf
    • http://dhl-order.info/fujotexototibon8j0c.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rawuzogese.rf.gd/engineering_drawing_notes_for_alp.pdf
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_ea94e72d4a4045379197bca5e1658ffc.pdf?index=true
    • http://nogomazarem.epizy.com/zuzukafukopapel.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_8adc5fb683ce41199eb494ca558b1b6d.pdf?index=true
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_3d5ddd9cefcf4df095cfa1ef4bf189ee.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_19a09f0ac34b4cf39400392eab70480e.pdf?index=true
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_ed1d535205ba4b6c8b0b0ee1efa974dc.pdf?index=true
    • http://tulufuparogig.epizy.com/adventure_escape_cult_mystery_complete_walkthrough_guide.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_off0000edbb.bin
407cf95c5c9c99deef0cda21fda096efc7d77748235bff82d4372bcc50f8c964		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 5436 bytes
font_01_sfnt_off00010041.bin
b6bab2a62d9de43bbfe9e51cea8bb3d2478dc742e04c4188e6d4f1a3fcc48b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 10944 bytes

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