Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a96bba54960737…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 22:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4331adad013028852e76171b1e19331d SHA-1: 18dc35bc900bab1476fb7e76f773ca434e416906 SHA-256: 22a96bba54960737470b9da0f5b98e50c442b2e821b86a821dab17a20155160e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('resalured.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to appliance parts, which is a common tactic for phishing or malware delivery.

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://resalured.ru/wix?keyword=maytag+bravos+quiet+series+300+washer+parts+diagram PDF link annotation
    • http://vekisonoloze.sportsontheweb.net/rakiforukafefi.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/86578947786.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/65256679710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_6030d83890b00.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/iggjbhf/75287132797.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/how_to_draw_a_cartoon_turkey_steps.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/gia2Cjf/clumsy_ninja_cheats_level_99.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/romeo_y_julieta_1875_cigarros_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/75Hvi4W/super_car_robot_transforme_futuristic_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/jehiPf6/37533598133.pdfIn PDF document text
    • http://stavki-na-sport.site/someone_like_you_van_morrison_chords_pianoh92sx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ff0dbf6104e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_6035e74e0bbc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugukokoner.myartsonline.com/how_long_does_it_take_to_cook_a_2.5_lb_roast_in_crock_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/55696791474.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/2020_video_games_nintendo_switch.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/dr_seuss_paperback_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/32939684420.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_off0000e2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EB 6172 bytes
SHA-256: a662b8b8b98ac95f78ba9ff1886886188acb34a9aad288f3898cc02bcaebb9d0
font_01_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 10332 bytes
SHA-256: 4b7bbd6762b51deaf28922eaea66c056d283ac52b698ea59dbcdd8d1a3a1e78b

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