Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d07926d0c2d30f3…

MALICIOUS

PDF

67.5 KB Created: 2021-02-17 18:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ee9d0cc0212c41b22cc4a162664ea49b SHA-1: 1189ffae902a7e2d9a3d75177e8336cf31a53c80 SHA-256: 5d07926d0c2d30f334c5c431cf42e3fd1b674b5fc0adce5700d719b31bd88971
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. The presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/aws?utm_term=how+to+set+up+tp+link+av600+powerline PDF link annotation
    • http://liolika-rsya.ru/gofexotudoepaez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_601bb527d857a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fd04df5188ac.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/e2d9406c163cf.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/gcicuhi/xanugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5feec4bd94770.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/3301164.pdfIn PDF document text
    • http://finansi-7.online/87837876249170jp.pdfIn PDF document text
    • http://fortuneo.biz/latest_bootcamp_windows_10_drivers0vzua.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/bohdhge/1762104545.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/gurukanelif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_60250fe589cb2.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/jimeta_zanin_wejonenaro_xiduposedozap.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jdRI4gh/domefamijani.pdfIn PDF document text
    • http://sis-paypal.com/mb_da061_087l_motherboard_manual275ty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_601daab366be1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fdc097b41c4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD02 5288 bytes
SHA-256: 74a453ffbf7fa73ee1410c814d22f63aeb72a518cd30d0e3bb3dee837b409b5b
font_01_sfnt_off0000df18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF18 9976 bytes
SHA-256: fdcf4e6190928b1ac4b700ee58715a80ca465446e85f6d3bb22884bab90b1fd9

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