Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcab6122af521ff…

MALICIOUS

PDF

80.6 KB Created: 2021-05-15 18:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 54d7ec28f13b23a6e3c7c29964203038 SHA-1: fa64c8dad8d8b5c94c56ff790c0bf134e41b5729 SHA-256: 2bcab6122af521fffdbf7d25888a8ba6c1dc1818752aa5c0c6a6aa12440874c5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to distribute malicious content or phish users. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful websites.

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://nipisod.ru/strik?utm_term=gateway+dx4860-ub33p+manual PDF link annotation
    • http://wivejudotimog.22web.org/agile_project_management_books_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481270/normal_6008b8989658c.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/8EGTijb/picture_frame_tv_over_fireplace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5fffeaf457f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_6009c96fd02f5.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/giauPhe/leweripogonibosidolifu.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/QPihjhx/skater_skirt_outfits_with_vans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391602/normal_5fe3cd7377efc.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/nitric_acid_msds_sigma_aldrich.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378853/normal_5feebc57753e5.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
    • http://zijedan.atwebpages.com/assignment_abroad_paper.pdfIn PDF document text
    • http://tivezobew.rf.gd/bajolemenozupel.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/cracking_the_pm_interview_online.pdfIn PDF document text
    • http://duwagisu.epizy.com/apple_time_capsule_custom_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48dd401c-3413-404a-86e2-2ea98e626ced/37641982869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2460c075-6ac6-47b6-b04a-c55869d53aa9/15542255403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051340cf-a6ce-4d95-98a3-685837dad995/sports_illustrated_cover_models_2020.pdfIn PDF document text
    • http://nibinelageniwir.epizy.com/film_genres_listening.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/99506924318.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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 5764 bytes
SHA-256: 02dc86457ba9cd8199060de8f51e053b112ea6d3a666282456b0ebffb1638248
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 12664 bytes
SHA-256: 959b5512080130d073fafb74f6c3ef5d3d90f7f897f70dec4b4130302267c58c
font_02_sfnt_off0001271c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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