Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b856177855a2f1…

MALICIOUS

PDF

72.0 KB Created: 2021-03-09 14:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 968463640faaea3b134b0b6a05787778 SHA-1: 115a9566f1d71fdd536e002e21a0d1b8db087e91 SHA-256: 31b856177855a2f146b63db4091eb533cc20995343e63293fb512caf4d5d551b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=internal+structure+of+a+leaf+diagram In PDF document text
    • http://zelolugo.22web.org/4457674479.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/268e8892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469827/normal_5ff88d4748c85.pdfIn PDF document text
    • http://tiktokfrance.fun/weed_eater_lawn_mower_parts_manualmgm09.pdfIn PDF document text
    • https://rijesire.weebly.com/uploads/1/3/0/8/130814070/tajafitiref-wifetevosame-dufadonosazu-titituma.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/0e24a0dec.pdfIn PDF document text
    • http://kuwufusef.22web.org/dutogulimavugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fe751a972f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_601bb3ef5274f.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/7116391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_602597398ef8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_6045e2f46594d.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/accrued_wages_and_taxes_balance_sheetnzp2n.pdfIn PDF document text
    • http://ig-about.net/50051268713fi0o5.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/266fc7e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413474/normal_5fe4808e7d8a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mipetilivanuf.epizy.com/best_flirts_of_all_time.pdfIn PDF document text
    • http://xifenarubomes.rf.gd/73164071185.pdfIn PDF document text
    • http://wozabuposeg.epizy.com/fakorudewiragan.pdfIn PDF document text
    • http://zatunikepozis.epizy.com/98045189972.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 5276 bytes
SHA-256: ca239ad8a1ae7f9cac1db9f1a3c2d2a3520419c93fe1dc531dd4a4fa5edee031
font_01_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 10304 bytes
SHA-256: 781a1ff775fd12057edbd2b6d994d3effc440a187bcbd17091ce4394ffed59ab

Open this report in the interactive analyzer, or submit your own file for analysis.