Malicious PDF — malware analysis report

Static analysis result for SHA-256 66af9b546fa897ec…

MALICIOUS

PDF

115.0 KB Created: 2021-03-25 11:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 94baec112b16d58475637b27e487f2e3 SHA-1: 7f14a5b594ddc614019813e5f851eb0ca2720063 SHA-256: 66af9b546fa897ecc543ee585b5e2daddb03aa4d465656b87dae6cc69a60c9f9
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary URL being https://xajibur.ru/123?utm_term=offshore+fishing+report+nj. Heuristics indicate this PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=offshore+fishing+report+nj PDF link annotation
    • http://itdiscount.info/mike_ma_harassment_architecture4mcne.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/FhiGgjC/rival_stars_basketball_hack_apk.pdfIn PDF document text
    • http://vinnipoh.space/80345719425zgx5u.pdfIn PDF document text
    • http://static-start.top/trending_videos_news_2019_stories20316.pdfIn PDF document text
    • http://consequences.space/vatalunewuligamuzirodaxiyuc9r.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/jjfTgjL/talking_dog_video_coronavirus_meme.pdfIn PDF document text
    • http://vitrinachel.ru/510919293210vp6j.pdfIn PDF document text
    • http://gooddevice-online.com/somidulfmbpe.pdfIn PDF document text
    • http://itdiscounts.pro/razer_blackwidow_stealth_edition_expert_mechanical_gaming_keyboardu3fsy.pdfIn PDF document text
    • http://redirunna.xyz/what_are_the_main_factors_that_cause_diversity_in_indiasvrch.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/dGiehfy/57274645185.pdfIn PDF document text
    • http://sqrab.top/dnd_5e_phantasmal_force_ideasju3j3.pdfIn PDF document text
    • http://clyb-wylcan3.space/rometome6t376.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d2f54fc2-c86f-4780-9776-244ae09a87fe/vst_roland_xp_80_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7119e34d-cfab-42eb-9eed-67d6d5ccb718/whirlpool_duet_washer_fault_code_f02.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/52300432776.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/c_programs_using_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a466370-d634-4d29-8735-d393b747178b/tabla_de_matematicas_psu.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/36874994258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7359ece8-7ab5-4ecb-91c5-d71e1cc7c4ee/thermo_king_froid_et_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec9a768-a629-40e1-8cc1-3382299002f4/why_is_the_press_called_the_fourth_estate.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/beat_saber_songs_not_ing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001751a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1751A 4812 bytes
SHA-256: 16a89c234028c94fa1b760822d4db8b3b7fb6373f8472366b85fb428f81e6531
font_01_sfnt_off00018574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18574 12276 bytes
SHA-256: 8f3181fc393e2138645aebe46e6d20b9083383d7f6f63eb884cb9644731fdd6d
font_02_sfnt_off0001af42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF42 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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