Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d3bb9f5d91d087…

MALICIOUS

PDF

66.3 KB Created: 2021-03-01 17:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a2fdbb071dcf650402544be441a48bf3 SHA-1: a73e6a24cd6574f91e816f17973af8261f1a833a SHA-256: 47d3bb9f5d91d087c94c2307449bba7e70e2b5bf6183012c60f1fcf5524b2cc6
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting, designed to redirect users to potentially harmful sites.

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://pelibifir.ru/wix?keyword=briggs+stratton+190cc+manual PDF link annotation
    • http://trafikcezaodebayisi.com/ethyl_acetate_safety_informationrsmqg.pdfIn PDF document text
    • http://muldwych.com/example_of_hotel_staff_meeting_agenda4wjsr.pdfIn PDF document text
    • https://sejoxamopizava.weebly.com/uploads/1/3/1/8/131858661/29d8e70.pdfIn PDF document text
    • http://italia-doc.space/tata_sky_app_apk_purevp2ld.pdfIn PDF document text
    • http://springtea.space/contoh_soal_dan_jawaban_akrual_basis_dan_cash_basisqd8f5.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/simulemifimafapot.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/63194479577.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/55569896681.pdfIn PDF document text
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/135a438b87.pdfIn PDF document text
    • http://simultaneously.space/megotuwedewifewinewgoivp.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/rakudosenagevofamew.pdfIn PDF document text
    • http://carbackseat.site/les_miserables_movie_1998_common_sense_medias83eq.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/8f422d72e97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujuluj.epizy.com/3203061751.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/international_law_firms_near_me.pdfIn PDF document text
    • http://maturar.rf.gd/xadalefatimatubax.pdfIn PDF document text
    • http://kitasiru.epizy.com/mouse_toggle_for_android_tv_apk_cracked.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_off0000c825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC825 5520 bytes
SHA-256: 4e14f8e43ad07fddd418f6abc2deb492840e05a855707813093342f7c6ffc1ef
font_01_sfnt_off0000dad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 9832 bytes
SHA-256: 1aac8f52951b0a798d6c3b3a06b942865dcad2e84e256240900acea1f03f09a4

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