Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb2d4238cf22aa9…

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 19:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09617266159c72b6280b957a9fce49a5 SHA-1: 2183bcb88f926b0f2631da2289008d45cc4ec4a1 SHA-256: 2bb2d4238cf22aa9196a4cb20f11c02eb5519bed6d2622c138f93ba85347dba3
186 Risk Score

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 0.9991

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=how+to+hack+pixel+car+racer+2020 PDF link annotation
    • https://cdn.sqhk.co/zarejesorufo/b8fpbMf/85739525176.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/6e2ec022303.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/53a0ea98f.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/iiihhio/wolf_girl_and_black_prince_episode_11_vf.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ggcagje/80391549130.pdfIn PDF document text
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/5324d24fc9bc4.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/f1576e71-0526-46a3-8083-795d616a522f/learn_hindi_in_30_days_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788ce4c0-3a7e-4fd8-bd86-15438fc07e1d/how_to_start_echo_dot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476df4f5-67ef-4582-a119-04c4df0367ce/who_was_sexiest_man_alive_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650857e6-c892-41e5-b256-7875a788f5fb/wikovagarete.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_c6fa6a1ec2b74dfd9e8650a6a29d2129.pdf?index=trueIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_c4081f3bad274add9935dc3543e1436d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e74342-a9cb-45e6-8582-5105da27e5ae/family_law_attack_outline_reddit.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_30e5fcb717894e61bb28902eea6ee244.pdf?index=trueIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_b819edcb7e5d452fbe5cf46aaf4ed797.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb404c1-e348-496e-a081-7496c5ead089/93468257946.pdfIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_e5a7282a99af44faa4d0b9f59827db1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f37bc12c-4843-420b-a622-3863e2e75aa1/fegikosorusujituluvikum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90318818-d173-4e46-bb67-4600f83d7852/how_to_use_poisson_table.pdfIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_0c20128a69a44c92a539c04fe7a966ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ee1eca-8ae5-43af-b12f-7c3a5346c8dc/jenn_air_downdraft_gas_range_manual.pdfIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_15bddff9f89648ab990ccfecc76e2019.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_5467b6a295ac4886a942abd0f4d01eb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb47b214-ecaa-4e96-b825-7a24f20d8168/how_to_calculate_mean_median_mode_and_standard_deviation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 5300 bytes
SHA-256: 769e60eb8887dd9962254401191a054820e3f6655b83cdde8454ba23406944d4
font_01_sfnt_off0000fac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 13916 bytes
SHA-256: 1994d3161c3d14c92f582b3d53401194335cc1cfebb78ade5843889d1733d280