Malicious PDF — malware analysis report

Static analysis result for SHA-256 135a2de777a563e7…

MALICIOUS

PDF

83.3 KB Created: 2021-03-23 18:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 27e2ee2e6abd2411e03d10e899b64f63 SHA-1: 258cad6eb3906e857097d943b655e44bae01cd52 SHA-256: 135a2de777a563e7d583c4d200f9006f926396ce785bd6474ecdea30a2cc3fb2
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, one of which is explicitly flagged as an external URI pointing to 'bologen.ru'. ClamAV detection and ML classification strongly indicate maliciousness, specifically a phishing or trojan threat. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=borderlands+2+game+of+the+year+edition+strategy+guide+pdf PDF link annotation
    • http://ubsvp.com/rival_20_qt_roaster_oven_parts816s2.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/Qjdhaie/80447937176.pdfIn PDF document text
    • http://design-kvartira.info/wuwuxuzenemidizidh9ph.pdfIn PDF document text
    • http://modetifito.iblogger.org/xugomidozu.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/hhusjdU/30163090226.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/uFEjccy/green_bomber_jacket_mens_outfit.pdfIn PDF document text
    • http://tpdreport.com/what_indian_food_is_good_for_acid_refluxfpg7e.pdfIn PDF document text
    • http://lejebodaz.22web.org/72943487950.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/RifiiUd/neon_genesis_wallpaper_hd_1920x1080.pdfIn PDF document text
    • https://cdn.sqhk.co/dojikerujuwo/jbOqjeJ/kodiak_cakes_recipes_microwave.pdfIn PDF document text
    • http://thedopemarketing.com/black_ants_and_buddhist_chapter_54nq87.pdfIn PDF document text
    • http://itagreen.fun/88594905818xd9hc.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/Kucixhe/xazosoxojavojor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_35859f52004f4d4d886c6182362a549a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fokapikow/32381394956.pdfIn PDF document text
    • http://varijaponinaza.rf.gd/candidiase_vulvovaginite_tratamento.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/akg_p420_frequency_response.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/how_to_share_a_link_on_facebook_story.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_32187fbb8f674a49b709c731a460ff15.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_143992519ed3415593c9bb999a644af6.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_be2c05f6ff2147b3b1a3cfc8027d7989.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/auto_click_2._2.pdfIn PDF document text
    • http://wubijati.epizy.com/zifepunokapuwiton.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/what_is_logical_reasoning_in_ethics.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_off000106f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 5740 bytes
SHA-256: 38e1f28ecd4f8fa93d71a6970279dcc9a8335696778e06f5774c541f07ed24bc
font_01_sfnt_off00011a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 10748 bytes
SHA-256: 55aac29f161aa93e89a4ada3ebe253f2660cd6dcbf0680d942d112ad510b883d

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