Malicious PDF — malware analysis report

Static analysis result for SHA-256 97be88ece9418081…

MALICIOUS

PDF

84.6 KB Created: 2021-03-20 20:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ce6248e97d2862a2fc601f87549b0d55 SHA-1: b1125a1d5c23b4eba460c8c95dfec7c5d41c261d SHA-256: 97be88ece9418081504ea0dc97e3fb229e0ee071e935c14be55959f0451b2d7d
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=alpha+titan+testo+uk PDF link annotation
    • http://nanebaxexob.getenjoyment.net/kiwokevudum.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/5838430.pdfIn PDF document text
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/f83e84.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/38ab1b3.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/jgEOHjf/mountain_bike_racing_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/YgfFwhb/61470576661.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/vEhhiar/12749184202.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/46172615940.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/craftsman_32cc_mini_tiller_fuel_line.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/xewumodat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/51f78dd9-46c2-4dc4-98c7-05e7a8aba234/mercury_4000_gen_2.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_c95be2cbfa2645b8aa942acdf727b4d3.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_abc0d6c4e9844c7f8f7ce3cb9bb83025.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_2b085479516d4eec991eabe7de443c34.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_19252cb938e746bbbc45ac8c87e10dc6.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_2c36c71b31c84660a867bd7aa0e53be9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69829cdb-2be4-49a1-bd18-4539eede59d4/fallout_4_new_vegas_ps4_release_date.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/43313968899.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_54b64fb3bbd34c76b7f7025c460bcf02.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_7c86468a29534ba1a9e224286b8a9d39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50689b0d-e31f-46c2-b899-f779058cbaa5/descargar_ana_gabriel_huelo_a_soledad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704ca74f-1c8e-431b-bc6d-7f1113fafcff/apc_back-ups_xs_1300_battery_replacement.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_ef9bdb09a37b44c5a6009dabdbc49d5e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba9cdc2-bf6d-48fc-ba75-5f2aa77f5ff0/batman_the_killing_joke_joker_tortures_gordon.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_0017451d31c54d468c3a84474edb2842.pdf?index=trueIn 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_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 4744 bytes
SHA-256: 13458089bc6e8ba5777b8077f123987798432f3e8bc49d26660ada8b64ae07a9
font_01_sfnt_off00011246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 10828 bytes
SHA-256: fed6fb16deb7c5b106b116be817aeb0aa1e8371c33250f79bc940466faa0e3d3
font_02_sfnt_off00013718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13718 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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