Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b382eec644f698…

MALICIOUS

PDF

120.7 KB Created: 2021-04-06 04:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0441c9c04301fd71523e9e474fdf14c8 SHA-1: ee7a7c03770c842f11965cd5d9d87adf085c5256 SHA-256: 03b382eec644f698e0ffa08518096394ae3276af04fda8b90a5ba38bb26cb692
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to obscure the true malicious destination. The document body, though heavily obfuscated, suggests a lure related to downloading books, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://seumenha.ru/award?keyword=best+entrepreneur+books+pdf+download PDF link annotation
    • http://lazadacostumercenter.com/nitro_free_download_with_crack_32_bitojhiq.pdfIn PDF document text
    • http://maxist.ru/rezewazurifurort20ml.pdfIn PDF document text
    • http://vuvefezod.iblogger.org/wipifetevaruneda.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/medical_terminology_for_health_professions_ehrlich.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/nisiv.pdfIn PDF document text
    • http://copyright-infringement.business/verenofk84x.pdfIn PDF document text
    • http://chambre.xyz/how_can_i_boost_my_rv_tv_signalyzd3q.pdfIn PDF document text
    • http://wei-nmvc.com/basic_kanji_book_bonjinshafmrdz.pdfIn PDF document text
    • http://ooovseanalizi.ru/washington_state_covid_numbers_by_countylsv8s.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/8107901973.pdfIn PDF document text
    • http://peludofnor.fun/47223986802fkwv3.pdfIn PDF document text
    • http://pakamid.22web.org/kitakoberakugosevosixol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakixaxev.myartsonline.com/96907937718.pdfIn PDF document text
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_fb8527e6467b4b1581649aa959b785ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakadutof/copper_sheet_gasket_material.pdfIn PDF document text
    • http://bafutosuxaki.rf.gd/space_shuttle_challenger_autopsy_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/mosojumosasiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/dusinujuxeboladuxuvijos.pdfIn PDF document text
    • http://tukaxowelu.rf.gd/ludibrium_maze_pq_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/22788583348.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/74608205170.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_426b45fbb2ef48d3b9938f2190f56486.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_07ddd731070e4c14a5f7f0119b22df84.pdf?index=trueIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_bc21b8c5b4e2478bb2e08133b4620e19.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_db6959334f28482887a8d10eb46f7261.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B32 5380 bytes
SHA-256: 26579262a0c5d56e053bca3978c29c7cff362d196b2bc4884ceb783582e27f98
font_01_sfnt_off0001ad9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD9C 11508 bytes
SHA-256: 9918570886062d2579b226e756f3fb4c923259a109f8ddbf2046214b2ffe1561

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