Malicious PDF — malware analysis report

Static analysis result for SHA-256 4292b1183b6d733a…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 08:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2955c73930d9c2f1a84508bb814588b SHA-1: dbb51772dc08811fc57de3c6c4bdf950aa09570f SHA-256: 4292b1183b6d733afdc8f14a8cef05999e303de9353138e89190c3ef6c0eed3d
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one to 'mezovuduw.ru', suggesting a link farm or redirection scheme to host malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to drive traffic to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=medford+craigslist+motorcycles
    • http://kixiwogazu.sportsontheweb.net/star_wars_the_old_republic_wiki_races.pdf
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5ff172484566d.pdf
    • http://nuwetiveguvo.mypressonline.com/gemukagoj.pdf
    • https://cdn-cms.f-static.net/uploads/4416790/normal_603436cd4913e.pdf
    • http://rexonina.medianewsonline.com/tegefixejuduwej.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fdc58c42b430.pdf
    • http://sijubuwejipamun.mywebcommunity.org/gem_trails_of_washington.pdf
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fe66d77f1466.pdf
    • http://saxobupazes.sportsontheweb.net/rebuzuwawobozimizimi.pdf
    • https://static.s123-cdn-static.com/uploads/4481280/normal_6002a4c9f2354.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/benubapopikaj/gadobovozisapimid.pdf
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_2e7518916eef49518a9505f38ab620d9.pdf?index=true
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_d7268243d3fe4287929fd3b8e3724899.pdf?index=true
    • https://s3.amazonaws.com/jolunenafobuw/how_to_study_for_the_pmp_exam.pdf
    • https://s3.amazonaws.com/vavabi/63302468142.pdf
    • https://s3.amazonaws.com/dekogamik/adobe_audition_cs3_kuyhaa.pdf
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_ce5615679cdd4c36a192f11a1264859c.pdf?index=true
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_e3a067c56f304690a37203f979d1ce8e.pdf?index=true
    • https://s3.amazonaws.com/zusevamasor/p21s_wheel_cleaner_ingredients.pdf
    • https://s3.amazonaws.com/jubiferekaka/frog_life_cycle_coloring_sheet.pdf
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_225ad66dbf654118bb2b592b2c08878c.pdf?index=true
    • https://1c6125c4-23e5-4661-bb7a-568cc4023186.filesusr.com/ugd/a298ce_3bbd7cce3cd64b7d8ad91d11922ede76.pdf?index=true
    • https://s3.amazonaws.com/mudurixo/winchester_10_gun_safe_review.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20d.bin
49ab8d1058a642d8f73ac2762667f4fbe583512f47e7722600f8923f862fcabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 5448 bytes
font_01_sfnt_off00010497.bin
d39c293ba21bcc530ee058cdb979bac831323c1d8dec4904860e7b2a397b225d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 10948 bytes

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