Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ab6979dfb1e32c…

MALICIOUS

PDF

137.2 KB Created: 2021-02-28 01:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 95bf59817b2243d3c7b80f3b0ecdcdd1 SHA-1: f31907e97a7d9baa89717e6d45757fb27ff4d461 SHA-256: f2ab6979dfb1e32cdd9871ca5fd5dd3d0d8cd9183759f14296aa6839aa718230
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and the 'link farm' heuristic further support this assessment.

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://kuzutuzo.ru/123?utm_term=john+deere+4045+workshop+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/vonezositixi/jhhbS4J/mikizilowikorodomako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_6003d900e7f13.pdfIn PDF document text
    • http://tesar-krd.ru/71465981656nsym9.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jhgfzgd/99687992708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_6014ecffa5326.pdfIn PDF document text
    • http://osmosiotzs.fun/2018_can_am_defender_hd8_service_manual8l4yi.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/geDgegf/41571681143.pdfIn PDF document text
    • http://zoxovimukanig.22web.org/vocabulary_list_family.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_6007c38d6e2a3.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/gAhiDjd/99943734637.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezekugagow.rf.gd/estimating_the_mean_from_a_grouped_frequency_table_tes.pdfIn PDF document text
    • http://zufejudo.epizy.com/rupinder_gandhi_2_song_buklan_video.pdfIn PDF document text
    • http://lamerowed.rf.gd/29902449954.pdfIn PDF document text
    • http://dusuvoparujizoj.rf.gd/3552621351.pdfIn PDF document text
    • http://wofelekupobepo.epizy.com/cheats_of_gta_3_android.pdfIn PDF document text
    • http://wubulinefoz.rf.gd/jilag.pdfIn PDF document text
    • http://misosemarimo.rf.gd/the_bullet_journal_method_free.pdfIn PDF document text
    • http://vaxabusegaw.epizy.com/electric_utility_billing_and_customer_information_systems.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_off0001d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D793 5780 bytes
SHA-256: be33c9e64ccba95be03db377c5a4104a4674c3d0b26d3535677ec9c3a616c12e
font_01_sfnt_off0001eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB2B 13164 bytes
SHA-256: 1f4d985f03e0a60412aca307a7ea1ec2dde3134bf67898274cfa181e24d7942a

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