Malicious PDF — malware analysis report

Static analysis result for SHA-256 85030bd675430cfa…

MALICIOUS

PDF

176.8 KB Created: 2021-03-18 05:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9d38d6b2469401d2a4005775b5072998 SHA-1: 0f6ff85586b2311f256b648d07145f020710983c SHA-256: 85030bd675430cfa8266a43bba0678e47b9fbf688d7ed269d9a5fb37903c436c
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to `jumiwimov.ru`, a domain associated with malicious activity. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further suggests a pattern of hosting numerous links on disposable domains, often used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/wix?keyword=ghostwalk+d%2526d+pdf PDF link annotation
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/1568564.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/calendario_2020_mexico_para_imprimir.pdfIn PDF document text
    • http://buylettersonline.com/9839516514ov996.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/15241268112.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/e6bf50db5f.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/fjjzihn/lelozok.pdfIn PDF document text
    • http://realwockyc.info/snapper_s28bc_carburetor_adjustmentl3boq.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/Hchbhfp/vuvorugusow.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/8736123.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/pevijojagesejo.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/FidNGy9/pazarekumevegowabitelim.pdfIn PDF document text
    • http://citrus-fruit.space/resumen_de_pelicula_la_leccion_de_augustxbfnb.pdfIn PDF document text
    • https://cdn.sqhk.co/vomoxixeri/doDidgh/elmira_ny_tv_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_e4916607d3964303998a3137133d45b3.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_919a98afdd184b74891b5056af0e93d0.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_a6be10a56f5e403d88a2db9a77cb2ae3.pdf?index=trueIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/printable_origami_instructions.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/parks_and_recreation_episode_1_stream.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_9b06e5b7669a4f4f8759a90a5e45aa69.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_24dc026f248745ad95cdc2250143a9a8.pdf?index=trueIn PDF document text
    • http://koriwironawuva.myartsonline.com/bricks_intensive_reading_3.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_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 131212 bytes
SHA-256: 2689ecc13b72f142d1ef5e7cce933641d0de9dd32a860723efdd992f19c93643
font_01_sfnt_off00027dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27DCA 5004 bytes
SHA-256: 042132e5c45e4c6cec2099be17ab968fb1fd22ad56a1e89208c7a87d32392b0c
font_02_sfnt_off00028ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EE2 11204 bytes
SHA-256: ba5d37c6e00e6fbaa19a3c8fd8b45b87a1f89abba3f4e22232b25e63eb550918

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