Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7819dd26809561…

MALICIOUS

PDF

95.2 KB Created: 2021-04-17 21:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ef8a903fd1fa3b4ed65cce582bd2365b SHA-1: eb8f313cbfb6207e7a133ef47bc148d73e614636 SHA-256: da7819dd268095618894cd81060cecf8aaef5d284bd3dcc52e7bda8063e81bf1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'natural selection' and a URL that appears to be a redirector. This suggests a phishing attempt designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=what+are+the+4+main+principles+to+the+theory+of+natural+selection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fd180dfbfe41.pdfIn PDF document text
    • http://edayafar.xyz/barojava50ds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_6052d2eb54fe2.pdfIn PDF document text
    • http://websporizlehd.com/labyrinth_board_game_with_marble5osi3.pdfIn PDF document text
    • http://gelokan.sportsontheweb.net/xipakirexerifasiwolojobev.pdfIn PDF document text
    • http://cleanup-sale.site/62964165835y431v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_6004373b2668a.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/wanakexamipapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fda39593029a.pdfIn PDF document text
    • http://civiliscmq.online/similarities_and_differences_between_maslow_and_herzberg_theorieseoggy.pdfIn PDF document text
    • http://options.expert/27266134096a8buh.pdfIn PDF document text
    • http://toppiksnack.xyz/segotewabxa2p8.pdfIn PDF document text
    • http://begetus11ppz.xyz/2020_saudi_aramco_operational_calendarqer6m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_6057c10f11b52.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/f4c601c4-8462-460d-880a-79c6cbc4e933/zigusizovimuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e20b95-7cd8-40b2-ba72-235906c5e4c5/garisuvipokulogale.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/practical_gastroenterology_and_hepatology_board_review_toolkit_download.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_6e81b8ec55ad4534b4c0b0c4da412249.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57c06aa-6145-4b8d-b2a4-31f86502ba6b/whistler_cr90_power_cord.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_335d21662e1c445e81a35e988af81f4e.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFA 5456 bytes
SHA-256: fa9b31ff82c86a316916f08ab0d94f0893cacf158e9fb82d9fe2a55346f781d7
font_01_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 11548 bytes
SHA-256: 6b2dd8ea6ccc6d8c647fbb234554477aeee56d17ca4f9279ab6553b7f60c2f4d
font_02_sfnt_off0001592b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1592B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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