Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87344f05e005b0a…

MALICIOUS

PDF

89.1 KB Created: 2021-04-06 19:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9e99d9cf459e066abd3bd025d1b36aa9 SHA-1: b1a173742e44abad629008a32694e010577e9f4f SHA-256: f87344f05e005b0a5fdb91d03e354c489afd54aaeb3ea36ccd4d597db77d3b78
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 phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'golowaki.ru', likely serving as a lure for users seeking DMV CDL road test information. The PDF structure and embedded content suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://golowaki.ru/wix?keyword=dmv+cdl+road+test+va PDF link annotation
    • http://xxlmature.site/tabla_de_verbos_en_ingles_regulareshfb9t.pdfIn PDF document text
    • http://dreabling.online/54318453350twyv3.pdfIn PDF document text
    • http://shoop-fn.ru/maytag_quiet_series_200_dishwasher_control_panelyc8hs.pdfIn PDF document text
    • http://adv-workshop.site/how_to_download_ti-83_calculatorf4auj.pdfIn PDF document text
    • http://byt-upak.ru/cbs_the_stand_review_rotten_tomatoesu8zwv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_606c11e22aba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_60522aaacf5f3.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/48a25cc7-1884-4387-b366-d28be641e6fd/vegobiwotejovot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758ec63b-1325-4cd0-ae39-ed4953dbaf5f/47496222460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ec3630-1958-4fc4-923d-a22c44bf45a9/simplifying_trigonometric_identities_worksheet_connect_the_dots_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/36297900010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9f1ef3-5077-4242-8274-b3d77ea3907f/nordictrack_1750_treadmill_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d203784-2ac8-4e52-80c2-736c480523f1/esv_study_bible_natural_leather.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/account_manager_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/56733069865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f42aca-ffd9-4a59-99c2-f9361b24e0c7/mikojoxexiwuwegogeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62c2e20-2a2a-4b23-a3f6-70aba2726f96/nujutolifodubozewe.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/how_do_i_delete_my_samsung_cloud_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1345aaa-0b48-414a-b143-068b917a223b/here_i_am_lord_hymn_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b0300d-286b-435b-b7ca-a5d5b4ed2101/55847113573.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_off00011f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 5144 bytes
SHA-256: e3d6c517cf6112f6bcfbbc03bda7b6b1da2164d5220e1224b4ebadc580599568
font_01_sfnt_off00013097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13097 11408 bytes
SHA-256: 9ce359350407f04bf9901ec4342dd277a06d27161accb4a9175c639c9c52dc86

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