Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d96ee5c538734f1…

MALICIOUS

PDF

152.6 KB Created: 2021-03-30 01:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 83fba7724a5177688f8e1e84f8a9a50a SHA-1: ad18d22e8226e2278e10b2cb52193a1fd21c42c5 SHA-256: 0d96ee5c538734f1ae01776a874f5689f49bb9f267f6d9d893fb226a0e1af2c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search queries, likely intended to redirect users to malicious content.

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://soxebez.ru/award?keyword=antony+and+cleopatra+short+summary+pdf PDF link annotation
    • https://cdn.sqhk.co/rojopuvukit/Xijheij/kitudoxugojumam.pdfIn PDF document text
    • http://remalizaf.iblogger.org/ali_baba_and_the_forty_thieves_full_story.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/13232343728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_604ad60766d22.pdfIn PDF document text
    • http://lefilew.iblogger.org/papibog.pdfIn PDF document text
    • http://zajowidased.iblogger.org/path_of_exile_immortal_syndicate_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418796/normal_5fe4c8952d74d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fd947149956a.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/jj8jcgg/roller_hockey_teams_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_605078083219c.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/area_and_perimeter_of_rectangles_word_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_600793767037b.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/dafumuxitupav/22991980887.pdfIn PDF document text
    • http://misiwoferejisuj.rf.gd/51582823142.pdfIn PDF document text
    • http://jebunojas.epizy.com/how_do_i_cook_chicken_in_an_aroma_rice_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25d0ddc-6ec5-47e4-aee8-891dd2daef65/how_to_get_better_at_financial_modeling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5dfd13-1822-40df-8df7-29d83bea0b0c/universal_waite_tarot_deck_card_meanings.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/anantkoti_brahmand_nayak_song.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_off00021ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21CA4 5484 bytes
SHA-256: f1ce768650f160c64c6fb1d7e5b4778f16d4c49e673b8722c24b6ca75fce1316
font_01_sfnt_off00022f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F2D 11352 bytes
SHA-256: b1db5e667be0d5af0f9eeb39c6a0cdb22cbb6371757a418f1ba890e2e78432ed

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