Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f04badf36af9011…

MALICIOUS

PDF

77.2 KB Created: 2021-05-25 13:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d82509b492970d9af79851db4813f5aa SHA-1: 40f0d2fb2d920279e343f684d7e0622ae162c6f2 SHA-256: 0f04badf36af90110990a91e31fe5b18465885d5ad48105d95419cd0a2808ba7
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains a title related to dog training, which is likely a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+stop+a+dog+from+getting+distracted+on+walks PDF link annotation
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/20275f97.pdfIn PDF document text
    • https://dopesijej.weebly.com/uploads/1/3/4/6/134612330/xerafamuxigeranukexu.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/742610a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_605bf3d7664db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_600507c3e2d3a.pdfIn PDF document text
    • https://dawujorukola.weebly.com/uploads/1/3/4/6/134683436/tulozegubezip-pereramo-xoboradet-zudibegumuzine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff8dbead0656.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/7d63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_603032fc99959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosagoba/nomeluwufivobazuzumen.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/famowozofegeradevurapurin.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/balance_sheet_accounts_chegg.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/xadatosusunulokot.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/bayesian_statistics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/76957846167.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/mewezaxofo.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/canadian_visa_application_form_imm_5256.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/2004_chrysler_pacifica_stalling_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/57442842611.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/the_new_chase_game_show_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/immigration_psychological_evaluation_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/peoplesoft_fscm_functional_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/17307766636.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/xobixowiretawukanunesatit.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/94657687619.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_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 5592 bytes
SHA-256: e17d259ff75fea1cfd3c167c4a45ff2bd4f11b7213dfe1e9b348cc7820971a52
font_01_sfnt_off000101e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 10816 bytes
SHA-256: d0a16e0967536ac2d8d27e7cfa3d2d4c3565d1b532400169f0e025a672a7c873

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