Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde9440ceed82201…

MALICIOUS

PDF

76.7 KB Created: 2021-06-05 23:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1af27769eb2e25f47cea2fbed80f3481 SHA-1: 97310ffdb8cc687196bd151eb4eec076ac51980f SHA-256: fde9440ceed82201b0f5afaa62b5c467d29440c8b68f3e06d4f1043044551947
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://irlanc.ru/pbw?utm_term=what+are+the+four+stages+of+embryonic+development+class+12 PDF link annotation
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/ef26a49.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/rifumu.pdfIn PDF document text
    • https://mobejameraxoluv.weebly.com/uploads/1/3/5/3/135316129/vifito-pobumil-virij-zalakudowud.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/8990b102-d919-40df-a7c5-de30bc12b1c7/valuvanasepovowifimitew.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144514149/how_can_i_download_gbwhatsapp_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04686eb8-e7db-4ece-9d43-7fcbf9e3408b/94668705557.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/tifabirugefaxuburexu.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144673014/12214794111.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144593160/litulobejajopu.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/w/file/fetch/144451095/zufotefobipeduluzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d30c38-d662-4979-92a3-a500e919137d/different_types_of_poems_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ecd6af-73e5-45b2-b9e9-c02ab9822438/rowan.pdfIn PDF document text
    • http://nipekari.pbworks.com/f/mere_peer_ki_gulami_mp3_song_download_pagalworld.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/w/file/fetch/144421812/intercultural_communication_concepts.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/ranexezemevenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb8c19c-7ffb-4224-9451-7c6ffcdeb634/voranikagakekajijafapo.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144468849/57487162247.pdfIn PDF document text
    • http://kolelulu.pbworks.com/f/56044715809.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144664419/cartas_de_amor_de_grandes_hombres_vol_1.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416232/61307679533.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_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 6068 bytes
SHA-256: 26583ed7b90329e57c26327a527f004c5f03e96d5637e423ba782f7384e38824
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10020 bytes
SHA-256: 745c15f6e2e073bb22ad8068c3e2e322e4dac6022b6c14e26a3ef3602779ee1a