Malicious PDF — malware analysis report

Static analysis result for SHA-256 747ce4c36fba0716…

MALICIOUS

PDF

87.2 KB Created: 2021-06-15 19:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7d2dd3b668cc1e0ab50e4389ada8e233 SHA-1: 500ac6fa6af9abca2d43c3f39971f291d30ffea9 SHA-256: 747ce4c36fba07166d907d1f845bfb0e66e1b9a3f7d73539aabe274647bedb1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=samacheer+class+9+maths+solutions PDF link annotation
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fcefaf1eae970daccc893ee9853dc37c/nerobiwujubilali.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/65980360930.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d4d20792---fubixufog.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/70ab46397140b177c7c81a9bf080e698/93138374787.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/9b01e6d5d73ec9a999e8f863187ae451/lorawevexi.pdfIn PDF document text
    • https://agatanorek.com/files/file/38091038131.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/ju8biol6l6vpm1n3umilnuimk0/lesevajafe.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d71af1ea2---lifomej.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e730ec84be9d78a2273e0259760827a2/pifipetirenu.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6c4f7314eafada42c4f2c0b6797d07e3/96171651680.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6b5eca458---soloze.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/006oc16lvgkjeo7rdieu3ovud7/12640394162.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077cede8cb9d---17187132263.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3dc69add5---basakunizisuronenamubo.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c42b53f93---44133200040.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/0bd5d607c754b4005da673eae181954e/54600746290.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca7e0dade---wesetenezixunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5180 bytes
SHA-256: 1eea49cfe261d702644104c2300cb389509d0570e3828cdefd58c50050b307f4
font_01_sfnt_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 12304 bytes
SHA-256: 98a8139e5f2dc469c038723d484aead56a6be0c56a3e89ac69d6c9c9c6d0a6d1
font_02_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 10944 bytes
SHA-256: faa1768ab242a151517162aec34adf24fc630048e7037b96063f8d0cfce43f60
font_03_sfnt_off00013f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F78 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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