Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d09e7c474cc59c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 08:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 323b63829d92f27391f1a8e1adc8540a SHA-1: 4831b59c6dbf253dea9fda8d78f7a3232b64f6ae SHA-256: 67d09e7c474cc59cb11f43005390fd6467b7042a137b93fef05b9c71bc442507
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with at least one pointing to a suspicious domain ('jacksth.ru') that is likely part of a phishing or malware distribution scheme. The PDF's structure and the presence of embedded links suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=2k14+basketball+game+free PDF link annotation
    • http://nireviwolaz.22web.org/dugavifi.pdfIn PDF document text
    • http://bitcoins-profits.com/3989404518uasip.pdfIn PDF document text
    • http://dovamemowiruz.iblogger.org/zorovatudapalaj.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/hCGV6B3/doom_slayer_cosplay_armor.pdfIn PDF document text
    • http://guzolupe.iblogger.org/vanisinoputomiluz.pdfIn PDF document text
    • http://istra-backwater.ru/how_to_restart_a_kenmore_refrigeratorvyy1k.pdfIn PDF document text
    • http://pressit.space/kikixuxean2p0.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/4X9hejg/download_cartoon_wars_4.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/hiycNhh/spelling_and_grammar_check_not_working_word_365.pdfIn PDF document text
    • http://healthytrands.com/nakamodebazosekilqgtau.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/dell_latitude_e6430_i7-3720qm_specs4ol9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_72f6cef281454bfa8f08923e78015cae.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_a8f9ac3352f546fb8c2c683ebd9b62c3.pdf?index=trueIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_760d575181834a7da7d6f64391dff10f.pdf?index=trueIn PDF document text
    • http://pomagupivedib.epizy.com/microbial_ecology_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134b6f74-0dbf-4981-9f48-184047409e99/my_zagg_keyboard_for_ipad_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613be7fa-5279-4a8f-aa31-7f9552f6ce62/two_by_two_nicholas_sparks_movie_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa09f85d-9751-4348-af65-24feaca94f0e/logolazupazuje.pdfIn PDF document text
    • http://sesenin.rf.gd/55552577285.pdfIn PDF document text
    • http://jefuzogal.epizy.com/sibazawagutisewojizunumot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 4992 bytes
SHA-256: b4d01962ea7775db27107ca944bda4d2c242a1608188f4ad796063b75b829f16
font_01_sfnt_off0000f9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E9 10820 bytes
SHA-256: 1b26a0db5707ba8e50f0e384ccf24b47860086f997220efeb6de96defecfd3c5
font_02_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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