Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc8bd04bd54f082…

MALICIOUS

PDF

85.3 KB Created: 2021-05-02 05:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 460b06417c496842d426dd42ff6f7554 SHA-1: a18592fae1516f68239aa028c61f05179c04c579 SHA-256: ddc8bd04bd54f0823cfebdea7222558b8785bc3a39da20ce41ccbcfa7be62697
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://fokemale.ru/strik?utm_term=honda+rebel+300+top+speed+km PDF link annotation
    • https://mosivupidener.weebly.com/uploads/1/3/1/6/131637589/dilugaxarig_kikidin.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/35000528093p8yh2.pdfIn PDF document text
    • http://oneshops.space/94263805626xwz9f.pdfIn PDF document text
    • http://shopeuro.pro/iit_physics_book_in_hindilekv8.pdfIn PDF document text
    • https://xasigorokukexef.weebly.com/uploads/1/3/4/8/134891024/a239d95a58a20ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_5fe8816c4f7c8.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/CM6jdab/10718020328.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/PgdMTgg/nfl_clash_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_6052cd8d2c3ee.pdfIn PDF document text
    • http://003-center.ru/dental_trauma_guide_avulsed_tootha89j8.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/mZFhbia/11325893790.pdfIn PDF document text
    • http://kovokibiv.22web.org/past_simple_regular_verbs_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5ffd5cac6da3c.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/fenodalov_kelezidefe.pdfIn PDF document text
    • http://romenuxepobe.22web.org/career_paths_computing_express_publishing.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/83ac58fe-ba75-43d4-94a1-00fa5d67520b/call_me_by_your_name_book_review_common_sense_media.pdfIn PDF document text
    • http://zuxuxakoves.rf.gd/ccna_notes_with_practical_in_english.pdfIn PDF document text
    • http://mudepenota.epizy.com/81196508583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bd7fc5-44ba-4c32-becb-1f92d0253fdf/zte_z222_4g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7dd0af8-d142-4794-b456-37e641181303/taurus_pt111_millennium_pro_iwb_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1a0a7d-9bef-40d6-b8ce-e6d1a1f72965/davis_vantage_vue_temperature_sensor_not_working.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 5576 bytes
SHA-256: 2b882dded8d86c05f5f31684ec0e20e260ed90d03a7365873072a7e1a70e29dd
font_01_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 11452 bytes
SHA-256: 4dc4b05e6c877e5e9b3a096098de5e6cd5d1bde1b6d64b818439c2b6365dff80
font_02_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 16088 bytes
SHA-256: 46584b0944db5b1cabc2a6eb39062c7ceba5731a384a94bb94ea1760b8686253

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