Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a6736db237a240…

MALICIOUS

PDF

69.7 KB Created: 2021-02-21 00:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9a5945c2c6f0085ffc42ab32655499f1 SHA-1: 21577aa382be48ba7c50e79c5df162d24abea576 SHA-256: 71a6736db237a240d961cb39d952884f2ce40e6c9b2d9493d2e097acc0ef72c4
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yafferge.ru/wix?keyword=aims+5000+watt+power+inverter+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_5fd89f0c76e9e.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/hdicMvE/angry_birds_2_axel.pdfIn PDF document text
    • http://free-at.pro/semimutenim3li7j.pdfIn PDF document text
    • http://fepimedofosi.iblogger.org/assumption_college_makati_application_form.pdfIn PDF document text
    • https://jukorupojos.weebly.com/uploads/1/3/5/3/135344641/nurel.pdfIn PDF document text
    • http://dorightschool.com/email_list_free_downloadq1b0o.pdfIn PDF document text
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/domizozo.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/fekenuz.pdfIn PDF document text
    • http://itfamily.pro/psnstuff_database_slimshady451fh3py.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nixuverojezuluz.epizy.com/interpreting_gloriosa_victoria_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/greek_islands_trip_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/65071297278.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/88622415118.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC556 5252 bytes
SHA-256: 9bb49a9bf469f14c5b522596fedacf44501b6aa5d6807d4163a3fdb816604e2d
font_01_sfnt_off0000d728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD728 10756 bytes
SHA-256: e15968a1f991800f34e2d5f1baaa1e029352f0d7b6da21be0a004b6cad55e438
font_02_sfnt_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378