Malicious PDF — malware analysis report

Static analysis result for SHA-256 a929f6b14bd8b1c0…

MALICIOUS

PDF

85.8 KB Created: 2021-03-30 15:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5135e9da2cb89b2d5805e3ecba2f959e SHA-1: 90a5b2a7855076de1b85c94b57ee990e24e1fc3a SHA-256: a929f6b14bd8b1c09ba63577cef7509ea3e9f4e11b3cf0c7a11ed3c5f52b7dcc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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 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://lozipotod.ru/award?keyword=english+alphabet+pronunciation+pdf PDF link annotation
    • http://sijiwepi.mypressonline.com/21158669720.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/biotechnology_and_genetic_engineering_book.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/how_to_use_nesco_american_harvest_food_dehydrator.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
    • http://suvokejixu.epizy.com/22074140298.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_76e74add7fa1497ca4180892d6b00b94.pdf?index=trueIn PDF document text
    • http://jokiperone.epizy.com/67945244992.pdfIn PDF document text
    • http://pinezininefos.epizy.com/climate_and_weather_printable_worksheets.pdfIn PDF document text
    • http://bapibalapu.rf.gd/jezodetawemexunimebazi.pdfIn PDF document text
    • http://dolaregasa.epizy.com/tepufebavuj.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/zofidojepupe.pdfIn PDF document text
    • https://1bc2da55-d9f9-46f5-9d67-b48dc82c85d4.filesusr.com/ugd/957ce7_0fcb6cde995d47fa9e3793c827925137.pdf?index=trueIn PDF document text
    • http://rolaxaja.rf.gd/kuzivuw.pdfIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_953685a7e3344bc99f76eebf3ec18567.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_e03df81dc06f4e7d8e224aeee5d38138.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_69a2a42035cb4bb1a26336b218ef6aca.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_58a2c55988804e90baea250ce5cd3cbc.pdf?index=trueIn PDF document text
    • http://xutenasejubibe.atwebpages.com/afspa_file.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/buffalo_bills_2020_schedule.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_6c1ddc6fda5242ff9999f8199df10ca6.pdf?index=trueIn PDF document text
    • http://pexirud.onlinewebshop.net/john_deere_l108_deck_for_sale.pdfIn PDF document text
    • http://mibodezoboro.rf.gd/batedeira_oster_perform_preta.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 5396 bytes
SHA-256: 3bcecea6d9489bb5dd27014465ac87a6bb984fe09f900a508175bb41ea656752
font_01_sfnt_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 1588 bytes
SHA-256: 9816a4d2089134828cd3e72eafe8d4ba93048f087430dcdd326211cca04c77f3
font_02_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 11960 bytes
SHA-256: 92ce858b7861945aa30f64b2553878e4e82e0d54372d32515a3f144bb17ac5cf
font_03_sfnt_off00013b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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