Malicious PDF — malware analysis report

Static analysis result for SHA-256 800d38be18740465…

MALICIOUS

PDF

71.9 KB Created: 2021-03-27 17:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4469b4c0e596fa22e8a9c2d5f99ba671 SHA-1: b6cebc7bf9c3ced6d38bc28bfe101dd82487a00b SHA-256: 800d38be187404650348ef3d8faa88becdca2d95d7f249074b85b5b7530ce6a5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with many hosted on disposable domains. This is a common technique for distributing malicious content or phishing lures. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=un+tranvia+llamado+deseo+online+latino PDF link annotation
    • http://bagawixaj.mywebcommunity.org/nice_guidelines_ulcerative_colitis.pdfIn PDF document text
    • http://kajipim.mypressonline.com/teleological_vs_deontological_approaches_to_ethics.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/f6af2da169.pdfIn PDF document text
    • https://dariwatipizodaf.weebly.com/uploads/1/3/5/3/135323996/waxiref.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/ghLPgiE/tosatuzewodizeti.pdfIn PDF document text
    • https://cdn.sqhk.co/fomanazoravu/NpsnheA/super_bomberman_r_switch_update.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/38269146215.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/good_transition_into_first_body_paragraph.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Z7icghF/microsoft_math_calculator_download.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/fowamazejokujofabe.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/73807050253.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/OijCjaS/97598371883.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/b1a5f56.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/742f0670-e28c-47aa-94ae-9ba45b608396/gotexojipaf.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/reliability_engineering_handbook_volume_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0853d4b8-451f-48a6-8755-83c12437a213/25572990568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7dce74-b850-42bf-8bf0-f4c7182ffa7b/britax_infant_car_seat_installation_rear_facing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675d6059-9602-4a54-9a8f-eaeab8212eae/pizeluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ed6ca8-c3dd-4b3a-90cc-1d1c755bafb6/do_the_original_xbox_one_controllers_have_bluetooth.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/epigeal_germination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602f4e72-cb6d-48f4-97d9-ffe6726b7b68/9952240468.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/jubokerujovamubaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270652ae-32ec-4358-a3a7-037f8d8bbcdd/lunog.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_off0000dc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 5020 bytes
SHA-256: 7608167567be4ba4046c18b212ff531affdfe9a273abd2d7d5c741e1b1fbb0ae
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 10688 bytes
SHA-256: cf38df4b22af109b1ce997e06382bed8493ed1f3cc21393d6466a42949bdc6b4