Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e25fb8c2305ad0d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-05 06:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 20cfbdeba1594ea14054eaff862f09f6 SHA-1: e8d797d6bd706435b48f61e9a5aa3e67a0c58668 SHA-256: 7e25fb8c2305ad0d4ef76440fe6f52a55b09fb13dd65b726bff354aed4c9a355
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with critical heuristics indicating it links to known malicious redirector infrastructure and is part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish credentials or deliver further malware. The primary attack pattern involves redirecting the user to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=darius+zayas+producer In PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/bikavit-wameko.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/lofabekekigutatunopaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_603ee3d34dea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fd7412c93bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_601c767ebc951.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/74263283206.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/wizosezipunamo.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/zekegufaxuwek.pdfIn PDF document text
    • https://zinimokukaz.weebly.com/uploads/1/3/6/0/136053997/bc0c7b14c.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/dowabebisuridijodab.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/4338805371.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/20667261082.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/1361abe73ddaab.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/wavebevusi.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/self_reliance_emerson_summary_litcharts.pdfIn PDF document text
    • https://xifemobagot.weebly.com/uploads/1/3/4/0/134000541/fexopekeni.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/tree_of_life_meaning_lds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2635016-ac5e-4ca4-971b-92e780eee394/jesus_calling_sarah_young_enjoying_peace_in_his_presence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf75eb5-9dd9-4497-9606-2624c66e9ebc/46539316531.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/pet_sematary_book_overview.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/fokiwekusedugunan.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_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5188 bytes
SHA-256: 63c9d795c924edcf42fa47f666fe62efb44ba778bd38e8a99bf07e8b1a44ebc8
font_01_sfnt_off00010172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10172 10788 bytes
SHA-256: 952d43dd46926667fb81bf149399bb069282f25bc79b5b52b992277244a0e51d

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