Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e98408c196225a0…

MALICIOUS

PDF

71.6 KB Created: 2021-03-31 21:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4069d9a013a54c2f0003e86c52d728c SHA-1: 4c65d0ba9275e063e1228274a481bf0145f7a32e SHA-256: 4e98408c196225a067b12c5223396c8d6288e7e8ccef297bc3edf0a2e6f8dea4
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment, likely leading to a malicious website or further payload download.

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/award?keyword=segment+routing+part+2+pdf PDF link annotation
    • http://tijukilebag.getenjoyment.net/25274268806.pdfIn PDF document text
    • http://maykistore.ru/begum_bold_font_freecezhc.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/63608271926.pdfIn PDF document text
    • http://aycotoro7.xyz/what_is_time_dilation_in_special_theory_of_relativitylsqtg.pdfIn PDF document text
    • http://ig-support-service.com/cheap_fake_nails_near_meo9at7.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/33134038708vy6gw.pdfIn PDF document text
    • http://mini-cam2.club/fefitukidobivfuc.pdfIn PDF document text
    • http://ductsunlimitedins.com/dixotekepawazii8fqk.pdfIn PDF document text
    • http://cetapp.xyz/pisipaxw2riy.pdfIn PDF document text
    • http://1xbet-football.fun/16301561750d2bzf.pdfIn PDF document text
    • http://opit.space/94580169921m03qa.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/english_to_french_dictionary_free_download.pdfIn PDF document text
    • http://yogist.fun/kubitaduguws69.pdfIn PDF document text
    • http://bluhgang.best/272570491578lts2.pdfIn PDF document text
    • http://leaninrzpd.site/408195130052pvyc.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/75a2d105-ecfc-408d-a55a-f0d22ae15101/punctuating_dialogue_worksheet_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e783e15-a454-4df8-9b06-5e60f4100213/50_shades_of_grey_movie_order.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_29a66cbc671049cda704715da6580a83.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_dcfc9eb48b9943ad83e60f8ed8bf4e90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a99a17e-ad67-48c3-b7a5-68f4fa19bae3/93550720942.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_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 5388 bytes
SHA-256: 63ff2177e9d785f41c11422c7a80f8957380e083e497c5f25da9f2c4fd3a4c71
font_01_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 12144 bytes
SHA-256: 71906e5230e95b3b063f349a97e29588591dc2b856535f2d07128e14c980850b

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