Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7feddeddafc7c7…

MALICIOUS

PDF

77.1 KB Created: 2021-02-12 20:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7d4fb02d9c6c0ef443c6c63801a36f17 SHA-1: 1e0d49f310960a7e9ef67dc5ff49d859a14336d3 SHA-256: 0f7feddeddafc7c71f894581c685b8471301906ad96fc9d61ace395952cdc4db
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=uniden+baby+monitor+nz PDF link annotation
    • https://cdn.sqhk.co/tixelila/cOiaFgf/fovapulapos.pdfIn PDF document text
    • https://tisegibak.weebly.com/uploads/1/3/1/3/131380339/2efc3a80c8433ee.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/sugunodama.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/mejijabaxokozide.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/iAhnxC5/hide_and_seek_custom_game_rules.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/7234711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5fc5b4f59e805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_6004ba2facc55.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/tevomenil/english_speaking_course_video_lectures.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/abacus_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/email_writing_format_samples_class_10.pdfIn PDF document text
    • http://wapemufabaloni.rf.gd/zosonilevakusoze.pdfIn PDF document text
    • http://wenumamugaru.epizy.com/74018112682.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/22282876542.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/broil_king_regal_s490_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/doxakofonelelavuwakaxomo.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_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 5044 bytes
SHA-256: 3795ad15481c3bd2806875291ff87e42ec8e468635199c4541b04b59ddae38e3
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 10588 bytes
SHA-256: efd081cf394c2c3a75a0a8a6f776724a7063b8b6cf725b4a874328df73537146

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