Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ea778ad5f5dbd9…

MALICIOUS

PDF

72.1 KB Created: 2021-03-23 06:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9d567651c2b251e66597539d1fc8069d SHA-1: c97fd07823bc47f171b5a03cac79c3c0db651e0f SHA-256: f7ea778ad5f5dbd9404ec67441c1cb11ed2fc7fef89153e48380303a3edb905b
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for phishing and trojan activity. The embedded URL 'https://midufefew.ru/strik?utm_term=what+day+do+macy+employees+get+paid' suggests a lure related to employee payment schedules, aiming to trick the user into clicking the link. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=what+day+do+macy+employees+get+paid PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390681/normal_6003b613ee552.pdfIn PDF document text
    • http://sedouche.xyz/14242573650cveo7.pdfIn PDF document text
    • http://zapalojonab.iblogger.org/apple_2020_annual_report.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/sample_cv_for_teaching_job_application.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_602b3462cdd82.pdfIn PDF document text
    • http://bigpleasure.ru/nys_dmv_cdl_road_test_paymentw8kfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fd680d5cdf6e.pdfIn PDF document text
    • http://simupujumojata.22web.org/how_much_is_the_dragon_ball_z_kakarot_dlc_2.pdfIn PDF document text
    • http://fasad-dom.site/bus_simulator_ultimate_bilgisayara_nas_l_yuklenir27iwt.pdfIn PDF document text
    • http://indir-kazan.com/dopagopem4c9o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupedapexonejov.epizy.com/67555992391.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/roxuv.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/free_arabic_fonts_for_windows_10.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/dijezagunon.pdfIn PDF document text
    • http://gopexodek.rf.gd/advantages_of_genetically_modified_organisms.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/visuvuvelake.pdfIn PDF document text
    • http://boxitevu.rf.gd/kokigexufasiraro.pdfIn PDF document text
    • http://malosebetu.epizy.com/91808040517.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/amazing_grace_french_horn_sheet_music.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_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 5508 bytes
SHA-256: 7950caf5bf651fbada09b72e3e67cf4d382e52af796c19c4d01a6e0838bb2574
font_02_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10976 bytes
SHA-256: b274a3ee621f984c8a80e8fea394d7f86ca6603b4fefb12b6c6787362ab41161

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