Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0d9ef62c68d1e2…

MALICIOUS

PDF

71.1 KB Created: 2021-03-09 10:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 29e605cca19f25ae4131ae7f25616f81 SHA-1: 61594ecd925823e7be86272ea4f7296192051d5a SHA-256: ec0d9ef62c68d1e2e9b12883de0d023f19a1de79f22e4db6425217a72206377d
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 domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious 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 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://ponafet.ru/award?keyword=autodock+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/luwesefizi/bt7njgG/monster_blades_hockey.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/htc_m8_eye_charging_port.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/Gighjhe/nfl_sunday_ticket_roku.pdfIn PDF document text
    • http://limecash.xyz/dell_inspiron_1720_ssd_upgradeyjykg.pdfIn PDF document text
    • https://cdn.sqhk.co/gatidixon/ibkijgs/23352909831.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/gcpDDYH/doramux.pdfIn PDF document text
    • http://detonic-de.website/how_to_write_equations_in_slope_intercept_form_when_given_one_pointoy6cx.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/pjhHXih/fitness_ball_exercises_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/hge8ghV/2214641829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugezukakig.rf.gd/earrings_design_images_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/anarkali_disco_chali.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/tonakejeruvuvewekegamidel.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/2625112252.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/printer_paper_size_guide.pdfIn PDF document text
    • http://noroved.myartsonline.com/sullair_185_air_compressor_troubleshooting.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/biriwimuzugesigozapozujux.pdfIn PDF document text
    • http://mojigoka.atwebpages.com/hybrid_migration_office_365_step_by_step.pdfIn PDF document text
    • http://mafolizol.rf.gd/vusaremedapu.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_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 5024 bytes
SHA-256: 955ca415534b61477b207e727df185d01a68bd1621c05dece73a57cc09786c15
font_01_sfnt_off0000ebc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC2 10496 bytes
SHA-256: bb2ebd0e6885027c4f8d7cc4da1ae3c559fa10d8d1d0919554e0bce4c07e2496

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