Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7136d13785b98f7…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 09:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac7bed8d8eb4f4294a604b2c8d6aa9c5 SHA-1: 71a831cf7193407ea55353bedd98031744edabbb SHA-256: b7136d13785b98f758c33c051d4809cc023b124e7457cde119f894b4fc232002
96 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 specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that appears to be part of a phishing lure, disguised as a resume. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=cnc+operator+resume+pdf
    • http://mobevusujezuno.22web.org/shin_chan_pics.pdf
    • https://cdn-cms.f-static.net/uploads/4413118/normal_604fd9c359d2f.pdf
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5ffd36b767381.pdf
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5fdcd54420f3a.pdf
    • http://copyrighthelpbusiness.net/3176801926f52op.pdf
    • https://zokexeti.weebly.com/uploads/1/3/5/9/135966989/a3758380e22921f.pdf
    • https://cdn-cms.f-static.net/uploads/4474191/normal_602416e4ae785.pdf
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/418325.pdf
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5fd8efcd41ffa.pdf
    • https://cdn-cms.f-static.net/uploads/4403541/normal_603ee4fbe741d.pdf
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/518866.pdf
    • http://mazipuvaxa.mywebcommunity.org/general_chemistry_exam_questions_and_answers.pdf
    • http://sutedadudek.22web.org/juvipogumavipibof.pdf
    • http://wawimetuboze.iblogger.org/vampire_slayer_quest_osrs_quick_guide.pdf
    • http://wabiferofuvud.mygamesonline.org/natupis.pdf
    • https://cdn-cms.f-static.net/uploads/4385004/normal_6023c6550f6da.pdf
    • https://cdn-cms.f-static.net/uploads/4476593/normal_6026a03c92566.pdf
    • https://cdn-cms.f-static.net/uploads/4480904/normal_603e71c8dd779.pdf
    • https://zoletewiv.weebly.com/uploads/1/3/2/6/132695336/ac2a4af35d141e9.pdf
    • http://lastmarkt.ru/expanding_and_simplifying_brackets_worksheet_gcse63l85.pdf
    • http://klyshsheff.xyz/11205808774ofcol.pdf
    • http://kikifikoxije.mypressonline.com/taponute.pdf
    • http://medesutaduj.22web.org/30732608190.pdf
    • http://mizarujil.mypressonline.com/antgeno_prosttico_especfico_psa.pdf
    • http://biolinkus.me/312023727553cbfq.pdf
    • http://fb-ig-violation.com/flying_dragon_n646srpo.pdf
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/cc58828051d21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xaxefoz.epizy.com/47967141714.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_off0000f0fb.bin
2d8baa177be186d142106e1c21b9d5abed21bb05d465c928eb2f9be16ac2c5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FB 5172 bytes
font_01_sfnt_off00010277.bin
3bb2291a83d46c08b31149c57189936082fb7a403b8e5a6d75cf83dc597801e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 11216 bytes

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