Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a06da1842069434…

MALICIOUS

PDF

76.6 KB Created: 2021-03-02 08:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e6db61c20f1678574b3665f4104b17 SHA-1: db43ab132aaa38af6710e6dba7ddab108659a097 SHA-256: 6a06da1842069434ac68c0e7111502d55a03fd6695f358955be587d9964100fa
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://dafemum.ru/wix?keyword=diamondbacks+spring+training+seating+chart
    • https://static.s123-cdn-static.com/uploads/4370059/normal_5ffb3ea53f150.pdf
    • http://wutanumijejol.sportsontheweb.net/ohio_common_core_standards_math_8th_grade_1.pdf
    • http://nibajafij.medianewsonline.com/hp_elitedesk_800_g1_sff_network_drivers.pdf
    • http://idealicacolumbia.site/apostila_para_concurso_de_auditor_fiscalgiydj.pdf
    • https://cdn-cms.f-static.net/uploads/4380073/normal_600b4f625d8c1.pdf
    • http://detonicro.website/how_to_change_f_to_c_on_braun_thermoscan_45206b9nf.pdf
    • http://poxumanavofeboz.scienceontheweb.net/asp.net_mvc_tutorial_w3schools.pdf
    • https://cdn.sqhk.co/musutalivun/cr9vgNn/it_s_full_of_sparks_apk.pdf
    • http://lalashoppen.online/chopping_board_colour_guidenrqma.pdf
    • http://vopugixeroramox.medianewsonline.com/how_to_change_chime_on_carlon_wireless_doorbell.pdf
    • http://btsworld.org/mabirujelupofevypab.pdf
    • https://static.s123-cdn-static.com/uploads/4379733/normal_6006ca7835b8b.pdf
    • http://mon-compte-cmb.best/how_do_i_find_the_code_for_my_lg_tv67ics.pdf
    • https://cdn.sqhk.co/vujaderaz/vigEkgd/charterstone_digital_edition_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6039a4238ecdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kilarosine.atwebpages.com/kuvabogetadagudivibewudel.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_off0000e3fe.bin
757eb3487eb7782ed1cd11c93b558c2daf778228ce1f6675282137e30f97eafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 5656 bytes
font_01_sfnt_off0000f70a.bin
92cf661ff4c37e65b9db3044dc2d0f4f2b8d7f229e317602ac5f18b8502c3a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 14808 bytes

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