Malicious PDF — malware analysis report

Static analysis result for SHA-256 61989c918390587f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-08 10:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 929827a689e8784cdc6b1e67a9d56353 SHA-1: eaec3ce45f9f973975e9c8cc0a4a82e61662d195 SHA-256: 61989c918390587f845af36d6a5dd706c1f741c68a5b8ce784b8b20b813b7d1a
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, with one prominent URL leading to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a disguised search result, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/strik?utm_term=how+do+i+set+the+humidity+control+on+my+thermostat PDF link annotation
    • http://juilopkiretlo.ru/21781227963gwuli.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/5_languages_of_love_book_review.pdfIn PDF document text
    • http://bapupozizevose.22web.org/rubber_sheet_drying_machine.pdfIn PDF document text
    • http://minuette.me/open_office_writer_iphoneotcay.pdfIn PDF document text
    • http://italywow.pro/zitewakimizelelagumepanot8496.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/ematic_at103b_digital_converter_box_troubleshooting.pdfIn PDF document text
    • http://raisinshq.club/ge_adora_dishwasher_error_codesgpzca.pdfIn PDF document text
    • http://poopo.ru/gudijugaiv83.pdfIn PDF document text
    • http://rupitori.66ghz.com/lupumonifalolakuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badememaveg.rf.gd/crystal_report_sample_project_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dff5267-737a-461b-b4d6-8ba28405728b/2011_rav4_starting_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87da09e3-447b-47b4-98ba-9af2918c5a2c/82901192904.pdfIn PDF document text
    • http://pajusokato.epizy.com/orthographic_drawing_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4abcf7-5748-4013-b565-5c861dbe4e36/honda_fg110_transmission_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd2c801-5dfc-4499-a23e-aefb7a6d7b51/how_to_bypass_emergency_brake_for_dvd_player.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/boi_bella_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d361f6b5-6651-4e5e-9556-5ceecd012589/94511856035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff647e1d-808d-470d-abf2-eeaa31dc547d/57941725018.pdfIn PDF document text
    • http://xajuvezovaguze.rf.gd/tavojupaviz.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/free_wedding_invitation_card_templates_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbf7998-32ac-43b3-9f72-dff647ed190d/312587249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6643061-df8e-4727-b7d8-8ca4951f61b3/delta_miter_saw_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/irrevocable_trust_template_california.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_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 5336 bytes
SHA-256: d9bf6f2026799feeb4599f2c26125e16058ae08a18e11bb3ec9a8644e940ebd3
font_01_sfnt_off0001103c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103C 11096 bytes
SHA-256: 96c1ee01535afb28bb406f26779eab92ede91dfa46ecb0549acebbfa055480b9

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