Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f196925e3860545…

MALICIOUS

PDF

86.0 KB Created: 2021-03-31 12:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dc60196ce030b97bf858ab4987c302a SHA-1: 9de8d22e5c7f5bf7b0fe217cfee8b5cf5528ae95 SHA-256: 8f196925e3860545cc055a81c5e1dd16738f7b7d858bcbba7c439ed441d33431
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this is a phishing or malware distribution lure.

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://seumenha.ru/wix?keyword=gi%25C3%25A1+asus+transformer+book+t100ha-c4-gr
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://onsideball.info/11937008740p0ehx.pdf
    • http://zoguponuwuxoli.medianewsonline.com/bojaxudotebabilisot.pdf
    • http://parrrtner.xyz/monivodoq5.pdf
    • http://idealslimitalia-oficial.site/what_does_graduating_college_mean_to_you_essayr2dxe.pdf
    • http://gdztut.com/sasapuzipixikubojaxoxefe9wjh6.pdf
    • http://maslovauto.ru/references_apa_format_word3ul88.pdf
    • http://tegubija.mypressonline.com/6454371011.pdf
    • http://mandarins.space/bosch_aquatak_110_plus_service_manualkyct8.pdf
    • http://interbankdigital.com/38190676003ojp9n.pdf
    • http://xuwavugox.22web.org/35064533088.pdf
    • http://extrameets.fun/6866653392vjdsn.pdf
    • http://rufoferapavinew.medianewsonline.com/academy_stars_2.pdf
    • http://budofibo.mygamesonline.org/xasojo.pdf
    • http://wirobigi.medianewsonline.com/nelajivazijuk.pdf
    • http://nurinubofed.iblogger.org/amortisation_of_company_formation_costs_ato.pdf
    • http://streamsweets.com/397653890205fi5y.pdf
    • http://widevuvi.22web.org/63032408610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f6908bcf-5274-4a61-8a15-c4e6d8f92fbc/lord_of_the_rings_the_two_towers_video_game_xbox_one.pdf
    • https://uploads.strikinglycdn.com/files/3612eab9-fbcc-43e2-b8b9-4e0ad24ee84f/fuwekibefu.pdf
    • https://uploads.strikinglycdn.com/files/f0642324-d328-461c-a1dc-7aaf5245164d/rijenewurelew.pdf
    • http://mufasiloxinak.epizy.com/stand_by_me_chords_ukulele.pdf
    • https://uploads.strikinglycdn.com/files/f4abd2e0-1c2d-4429-97ba-f759200afd9a/who_wears_the_gimp_suit_in_american_horror_story.pdf
    • https://uploads.strikinglycdn.com/files/dde35fc4-6c42-460e-a4a0-1b173b04236e/the_school_for_good_and_evil_book_1_recap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59f.bin
6859321b15a328f7740a67f543a044576bb791cb40975a5f6677788f7d875dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 5928 bytes
font_01_sfnt_off00010929.bin
79ec68f8449edd18e074ecaa8864a9651d816fee50d52025277e195745e6d214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 22596 bytes
font_02_sfnt_off00013a21.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A21 4324 bytes

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