Malicious PDF — malware analysis report

Static analysis result for SHA-256 610f70eb0198a435…

MALICIOUS

PDF

74.4 KB Created: 2021-02-05 08:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5da34e715c8a0c46512cdfa17b56cbd8 SHA-1: e3dfa48bb1f0f7900668998f7fda92530d1066e0 SHA-256: 610f70eb0198a435f409244253c7b9c103fcf9950ecf455f5938d9099f58121f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/123?utm_term=appliance+repair+north+hills+ca PDF link annotation
    • http://devlp.design/624947767811rw1s.pdfIn PDF document text
    • http://misstourist.info/kusizerafakazezizoxw1cem.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/czpRVia/30817584585.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/ifjfCZq/sifokegelowuvemufana.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/iemthgj/allo_allo_cast_where_are_they_now.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/JaP4uig/kutofesimekazekelisejexa.pdfIn PDF document text
    • http://shoop-fg.ru/13972582245m5mau.pdfIn PDF document text
    • http://capridigi.com/547959646yev6k.pdfIn PDF document text
    • http://sokolov.fun/tigowsmfro.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/775DPVb/bipilufejotonefitagijef.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/gcgcSgi/15397745804.pdfIn PDF document text
    • http://particulieres-societegenerale.best/52220273914vsrup.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/21129471612dbrgj.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/iahjvie/lightweight_motorcycle_helmets_for_womens.pdfIn PDF document text
    • http://okstore.info/39364161628hvo60.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ikggxhg/73219124274.pdfIn PDF document text
    • http://gelchlen.fun/74235924381bowpm.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/gFghicr/bowuzepixedivif.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
    • https://s3.amazonaws.com/folexapurilowe/elements_compounds_and_mixtures_worksheet_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/15087736565.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/shanti_narayan_differential_calculus_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/68314203011.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_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 4796 bytes
SHA-256: f427e2ea24be300580a7271600f04c048e74f5ecdbfe1c81269f310862d98876
font_01_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 10124 bytes
SHA-256: 9cbb51de38d303d9e8fafdfcaf22446abd43fc6d8e45b37efaeef7f06bc9e3c6
font_02_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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