Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e6dc5f1c293be5…

MALICIOUS

PDF

83.8 KB Created: 2021-03-16 00:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: df33e1a082f7d72e9ce8c38913aed562 SHA-1: a3353f2954d2c7a7c1d567ce5c9887320a51f1d9 SHA-256: 95e6dc5f1c293be5eba18605bea905690b09b376a12e2895de72aab2d9d7a7cc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized PDF documents, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=mount+and+blade+2+starting+stats PDF link annotation
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/gulijijupar-fabezexa.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/apGEhiY/ates_ve_su_6_oyna_kral_oyun.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/QjdkFdl/fewakulomaluforaxiwodomos.pdfIn PDF document text
    • http://filfex.ru/what_is_stephen_hawkings_iq_levelona5v.pdfIn PDF document text
    • http://shoop-fm.ru/kozikifatejotixolivirojo2hy.pdfIn PDF document text
    • http://autobaff.xyz/93224332703y152k.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/winula.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/sibulu.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/7408236.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/jIghdQB/cumulus_cloud_formation_image.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/hp_deskjet_9800_drivers_windows_xpuexc1.pdfIn PDF document text
    • http://hookup673.site/mumixumebubirifumuwiozmw3.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/WWBgfif/ludo_king_install_app.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/xufoxorog/choreography_dance_bts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbade8be-7b00-41d5-a811-b8a2f4c59f4d/q-see_camera_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/biwobemopa.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/sql_coding_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0cc650-0a68-436b-8381-4605ce09e5ff/lilibusisisovarovu.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/68979495267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c674c7-3abf-4e83-9b71-8aced623eaf8/the_professor_and_the_madman_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/27894954043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71939ccb-4f43-4796-a613-7ac70918f92b/the_greatest_miracle_in_the_world_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/vitafamuvekorefafofupipi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/apology_letter_template.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_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 5272 bytes
SHA-256: 604b13e3e0b536fa6843d7ef5057d777cc968f8f0a79b632c1f43357486e4f7f
font_01_sfnt_off00011ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDC 10576 bytes
SHA-256: fb5ee5dd27c580913fdb80a40629a2089bd67d6c4b30f679bcde80f7a90c48f4

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