Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90262e296fd176e…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 22:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2a91d07ff2ff5f16e595d28741b58421 SHA-1: 57107d13127d3bc9c0e100f6457f2b9771edcd79 SHA-256: a90262e296fd176e2e0a871a906817b089797092e099ed58ad3d6b3c82f099d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://pelibifir.ru/123?utm_term=the+bravados+1958 PDF link annotation
    • https://kuwupixunipava.weebly.com/uploads/1/3/3/9/133986845/dubizazerid.pdfIn PDF document text
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/sasizuxotatewolu.pdfIn PDF document text
    • http://jezugelevafebir.22web.org/1758897112.pdfIn PDF document text
    • http://bubixuwegopoxer.22web.org/59074024668.pdfIn PDF document text
    • http://wexoxunesixu.iblogger.org/nizikuzotinaposaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da9064f-644a-4041-b6ab-c400b68e0519/what_is_rhythm_in_web_design.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/computer_hardware_installation_maintenance_and_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/93183254007.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/52761999575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db61e3be-2ee7-40d7-85da-e8044c2c9703/cen_tech_battery_charger_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/15921799642.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/fenutozitiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f7be5c-d514-4183-9761-68143aae0ec4/how_many_minutes_per_pound_do_you_cook_a_turkey_in_an_oil_less_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc67c70-96d0-4ff0-8d85-bb8e1c5c94d8/how_many_calories_in_a_dunkin_doughnut_munchkin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d2a675-21f3-42f5-8f27-52e4883d7bfa/duvugotenipojeduto.pdfIn PDF document text
    • http://zomimek.epizy.com/singer_sewing_machine_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/new_movies_2019_bollywood_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96348454-b727-4a69-93c6-9d858eea175d/gidadajekirep.pdfIn PDF document text
    • http://jidodurej.epizy.com/82081322270.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/xamarin_android_bitmap_from_drawable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1d61f5-83e2-4b5a-944a-1ee939b8505d/the_fall_of_five_book_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e264f592-9c00-405a-baf1-0390bd5206f6/15022954759.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/cartiform_shelf_life.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/9567645833.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED65 5556 bytes
SHA-256: 1399b08fff6ad9f9542e8fb84b126a2ec5128d3ff7d4128e05de87611f7f2507
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 18896 bytes
SHA-256: 657dfedbc39f15478e944d299eeda9e6e4e0f07925232a49324eb8bf9f00dd24

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