Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc8239f5960c4f3…

MALICIOUS

PDF

78.5 KB Created: 2021-03-19 07:17:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: def6f706bb04bfcf55d52f034b722c30 SHA-1: 2c92834fdf96c903906f5a1ff159ee9e40d4c263 SHA-256: 4cc8239f5960c4f3af6a4f8fbef1e2280546aa400688994c4fca56245d49fc6c
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to external URLs, one of which is associated with potentially unwanted software downloads. The presence of numerous external links and the use of disposable hosting suggest a tactic to distribute or promote various types of content, potentially including malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=kingdom+new+lands+mod+apk PDF link annotation
    • http://wunuvuzixuxi.getenjoyment.net/2020_calendar_print.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/kevaguxorinesikom.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/1434763943.pdfIn PDF document text
    • http://xivekoto.medianewsonline.com/74904991391.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://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_0fc7fb665bd74c6b85dca986ecbf543a.pdf?index=trueIn PDF document text
    • http://domebiwek.myartsonline.com/barefoot_investor_audible_australia.pdfIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_e21d37b0bdaf4c0194abb6d063bcf29c.pdf?index=trueIn PDF document text
    • http://goxafebo.myartsonline.com/vertebrate_zoology_books_free_download.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_0abab4a4a9de4bd2b396e091303bd277.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/navy_seal_combat_uniform_for_sale.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_574015e1c6454370a10b128d18c2f518.pdf?index=trueIn PDF document text
    • https://28ae28a3-27cc-4d38-be83-0de1f6925f83.filesusr.com/ugd/454016_80daa3f8f3764c42ab3a76c08adf7183.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_8754c6920484436f9bbcc4365df4917a.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_41b57d64a04c49d1b84f527c381ca2a2.pdf?index=trueIn PDF document text
    • https://38c8c62e-1823-4c1e-8220-bc61efcc8a1c.filesusr.com/ugd/c24b9b_5b099908857947a8819d89d394a01b57.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_8d041329a677416d95094ca8f8368022.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_0aa1896d509d485f91343585c45b6cf1.pdf?index=trueIn PDF document text
    • http://roxujewov.myartsonline.com/what_are_some_of_the_different_types_of_sculpture.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_5d246a4876594bd3a8b8a8e75b144918.pdf?index=trueIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_c0abd21abf8e4e4ba473853beaeafab5.pdf?index=trueIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_65e9af5dadce453dbbe199f8073c6d50.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_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5016 bytes
SHA-256: deef2ec27f32afc2370410e6851e9b40015b6339ba59e6ad1ccfbe1d52102177
font_01_sfnt_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 10952 bytes
SHA-256: e31efaf5497619679ddf8cb9cd1cace5dc863201ca5adbbe1c1d9f61e6c4f315
font_02_sfnt_off00011d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D02 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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