Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cd0899d4ead16d…

MALICIOUS

PDF

73.9 KB Created: 2021-03-13 23:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9525cb29754a879ab2de779a41a510 SHA-1: 10d477df073f67b8e489d43178d82d8c9ae651d1 SHA-256: 58cd0899d4ead16de329035b24385adee1b776c1812902aa031582be2e78ad40
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs and was flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'classification algorithms pdf'. The presence of external URIs indicates an attempt to redirect the user to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/123?utm_term=classification+algorithms+pdf
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/pebozuvubobojig_zojadi_datotajov_simolasexal.pdf
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fc9423fe49bc.pdf
    • http://rosoxul.iblogger.org/51641658729.pdf
    • https://cdn-cms.f-static.net/uploads/4402949/normal_601faa0665d8f.pdf
    • http://ralanizu.iblogger.org/1182756520.pdf
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/e72213bf.pdf
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5ff607a8be5a0.pdf
    • https://cdn-cms.f-static.net/uploads/4490720/normal_603a88b2a60c9.pdf
    • https://nuguviroguzemek.weebly.com/uploads/1/3/1/0/131070089/rivudapixaxi-ruxali.pdf
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/1776535.pdf
    • https://cdn-cms.f-static.net/uploads/4478127/normal_601b6f7417cde.pdf
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/vazonesoditu.pdf
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/4932872.pdf
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/tenatamuf_vetezenak.pdf
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/8782322.pdf
    • https://mopobaseburole.weebly.com/uploads/1/3/4/8/134859053/zejanit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sejisetelasisel.epizy.com/birthday_card_template_funny.pdf
    • http://kesazubajumat.rf.gd/38427462325.pdf
    • http://xatofuli.rf.gd/92657689530.pdf
    • http://bibuligo.epizy.com/a_beginner_s_guide_to_japan_iyer.pdf
    • http://dezezefisimel.rf.gd/womegeladinigiro.pdf
    • http://wegadikas.epizy.com/82920412730.pdf
    • http://guvamimifufirar.rf.gd/behr_paint_home_depot_rebate_form.pdf
    • http://tujukiji.rf.gd/the_wim_hof_method_book_download.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_off0000e114.bin
3b893629987e87166f6222456cbb44cbfb373ab27292aaf0a01cc7f84519e1d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE114 5476 bytes
font_01_sfnt_off0000f37f.bin
5e188d187895fc7483deda1791a03db04c0f0850d6e63f714201e4ae391d3a2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10832 bytes