Malicious PDF — malware analysis report

Static analysis result for SHA-256 de47eea51a062cd0…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 17:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1bd21d125be3b390e4e42902f4f5e713 SHA-1: 7ade4c6090cb451db9be032186d678048c4ab55f SHA-256: de47eea51a062cd08e1c5113c7542e6ad63ba1c9838861d56ad98966def33faf
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm designed to improve search engine rankings for malicious content. The primary malicious URL identified is jumiwimov.ru, which is presented in the context of a 'mapamundi politico capitales pdf' lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/123?utm_term=mapamundi+politico+capitales+pdf PDF link annotation
    • https://gufamaran.weebly.com/uploads/1/3/4/0/134017683/novuzokadupatif.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/5jolgeL/65816456624.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/f404a24fb7c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366022/normal_600445b938d19.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/vjbFcF1/megewujupukakifujer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_60182c8a2b638.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/bHqQ2JD/spinning_tops_battle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/gdhe58s/metal_ball_obstacle_course_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_60450b669f811.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/a2e6074b-2d95-4733-956c-a1fcb74cc6e9/32780724266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6a3597-8db0-47b9-8033-20ccf227570c/nissan_forklift_parts_breakdown.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/bukowski_poems.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_9b8377ae91c74870b18f0fb72b413681.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_9167cded8e914529b5afcc5490626abe.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_3e58ab66a3f84b919af98c7aa68d042a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/famiwowoziwoxokodujesaga.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/break_up_telugu_movie_songs_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0616a8d-9156-4908-b832-97833d4a6a59/how_to_replace_toner_in_brother_fax_2840.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/77148298638.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_cf180a9966204487a99428366cdbd4c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ac739b-dcc0-4944-ab12-85bb8dd6015c/advanced_engineering_mathematics_solutions_manual.pdfIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_65dce4eeba4d45b9a24587298ee7f5ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xojafemori/68583794778.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_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 5212 bytes
SHA-256: 0fbe8148d4c6d6c62450e24780b1f4d9e4f3835e74a8fd70af078df6cb450ccf
font_01_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000121b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B8 12304 bytes
SHA-256: c2964daec150f62ba96618d0fdc67fe7356b64594a564c44d3e9003ab8f081c1