Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6285c8fdf91aaa…

MALICIOUS

PDF

76.8 KB Created: 2021-06-06 21:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d99995f8ac9831ce5ae91109106ac850 SHA-1: 44729d03ee49591b69e63c6c959e6cfafb590902 SHA-256: bd6285c8fdf91aaa77d970e2f81e412703528f094e68734211056d5f24b4f2b6
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to financial applications. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, likely to obscure the true malicious destination or to distribute various malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/123?utm_term=barclaycard+commercial+corporate+cardholder+application+form
    • https://cdn-cms.f-static.net/uploads/4423780/normal_606ce7732ab25.pdf
    • https://static.s123-cdn-static.com/uploads/4373778/normal_5feb0aad7bd2f.pdf
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/pogomolosevodav_lotofima_duduji.pdf
    • https://guwadutu.weebly.com/uploads/1/3/5/3/135347148/f73fab2a2a5757.pdf
    • https://dijaxoki.weebly.com/uploads/1/3/4/6/134666341/lajowasozemo.pdf
    • https://cdn-cms.f-static.net/uploads/4463560/normal_606082cb5d51f.pdf
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5ff9f68e5336f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://funuvutidip.pbworks.com/w/file/fetch/144466980/anjaana_anjaani_movie_download_in_720p.pdf
    • https://uploads.strikinglycdn.com/files/cf809d8c-a614-4a72-a83d-2a8e4371183a/tekanamopula.pdf
    • http://nixefijevumu.pbworks.com/w/file/fetch/144554952/sims_freeplay_ipad_cheats_2020.pdf
    • http://lumoxag.pbworks.com/f/sword_art_online_infinity_moment_full_english_patch_download.pdf
    • http://sejuworepow.pbworks.com/w/file/fetch/144556998/sims_4_cc_furniture_folder_download_2019.pdf
    • https://uploads.strikinglycdn.com/files/7231a1b5-c000-4dc5-9584-45e2adb1e51f/traveller_book_2_starships.pdf
    • http://dijakezepo.pbworks.com/w/file/fetch/144439077/mesekogelobixuguparotilet.pdf
    • https://uploads.strikinglycdn.com/files/907f1e16-3840-45af-8aef-520031471460/9690120097.pdf
    • http://kedetuwi.pbworks.com/w/file/fetch/144413241/the_power_of_critical_thinking_5th_canadian_edition_ebook.pdf
    • http://kigemulu.pbworks.com/w/file/fetch/144694077/wendys_avocado_blt_grilled_chicken_sandwich_nutrition_facts.pdf
    • http://rumusapage.pbworks.com/f/dibadagavutox.pdf
    • http://jetipufagi.pbworks.com/f/sotudedifotuzasewanorolu.pdf
    • http://matajin.pbworks.com/w/file/fetch/144709869/how_to_find_spotify_premium_code.pdf
    • https://uploads.strikinglycdn.com/files/e74e9d08-6099-4d98-bb86-9a13b9b2629a/49614543339.pdf
    • http://lekuzax.pbworks.com/f/34748203989.pdf
    • http://pajajafilexe.pbworks.com/w/file/fetch/144731904/76549036898.pdf
    • https://uploads.strikinglycdn.com/files/faaaa7bf-1a8c-4e0e-bded-a566f5d25bee/2006_chemistry_regents_answer_key.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bb.bin
d885bced34ae9eb8b6d6b64f67589a45ea4171100ff1b012f77e504f20889a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 5368 bytes
font_01_sfnt_off0000fada.bin
3e33277b3352f3be3bba1f178167433cb91a5775506a89a35091d140016a6567		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 12148 bytes

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