Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b2075184c384a9…

MALICIOUS

PDF

84.8 KB Created: 2021-05-13 08:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72259d39be842f71f609c1a591467670 SHA-1: c1943d9b3f7848b8ec914365db2aa347d434dc8e SHA-256: 02b2075184c384a9be885315c40e17c365bbb24e1bbff04aeb451e80b84cb25a
126 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://pelibifir.ru/strik?utm_term=google+map+api+calculate+distance+python', is presented as a search result, likely to deceive users into clicking. The ML classifier strongly indicated maliciousness, and the structure points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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://pelibifir.ru/strik?utm_term=google+map+api+calculate+distance+python
    • http://vifezitenof.getenjoyment.net/75137744119.pdf
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/6f70c6a.pdf
    • http://xinuvaro.sportsontheweb.net/insuficiencia_cardiaca_congestiva_fisiopatologia.pdf
    • https://cdn-cms.f-static.net/uploads/4457839/normal_603677fb0c125.pdf
    • http://subejewumo.scienceontheweb.net/45415369416.pdf
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600be6a120629.pdf
    • https://pemesekisubabas.weebly.com/uploads/1/3/4/6/134659876/xamanafurate.pdf
    • http://filozajerezabi.getenjoyment.net/advantages_and_disadvantages_of_social_media_in_business.pdf
    • http://fegivate.medianewsonline.com/angeles_y_demonios_espaol_gratis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_36d8460c10cf4f67ab47927a94f5a1cc.pdf?index=true
    • https://s3.amazonaws.com/wukevirenesu/what_are_the_physical_properties_of_seawater.pdf
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_dca032f130c64fa9b639e21f03f61b8d.pdf?index=true
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_f3977c1e47214dc9b25b788fe6166d2c.pdf?index=true
    • https://s3.amazonaws.com/remeranexe/mesh_and_nodal_analysis_questions_and_answers.pdf
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_ab19a17b820b4c038f75536de7ef71b4.pdf?index=true
    • https://4c38db24-2924-4bf2-81c9-04860d987a69.filesusr.com/ugd/a68d8f_3a3b1c66a3804617b4b92f9a27211d35.pdf?index=true
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_9097e3ec6b1a4077bc61611dde56d508.pdf?index=true
    • https://s3.amazonaws.com/nasitevu/85665461919.pdf
    • https://s3.amazonaws.com/pexodugosa/99124246310.pdf
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_6f32955465914d03b9da51c503196f65.pdf?index=true
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_c7158a42678340ec94f30bee0eb97a4e.pdf?index=true
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_92112a81da8c4604a93d9debbea3dfab.pdf?index=true
    • https://s3.amazonaws.com/baposivarabuj/modern_talking_cheri_cheri_lady_lyrics.pdf
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_aaf9a60225dd4feb88e417abf32d2fe7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010077.bin
11009a87f3764d9e635dc3a39fd32fe33e6589c465363d919b99213ef7b9fd03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 5404 bytes
font_01_sfnt_off000112b9.bin
378c70fee721ac7227d93fdda9719ab190e439a8a646ae126afa6245e0905cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 10744 bytes
font_02_sfnt_off00013754.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13754 4324 bytes

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