Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60b0a8266e9c811…

MALICIOUS

PDF

89.3 KB Created: 2021-06-14 06:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7df73591e386058e6b34427268a1d138 SHA-1: 7072cc310e6256011a377f97697ba90ce8d79e84 SHA-256: b60b0a8266e9c811067ed4a5805dd778c37cc72c86b51bf94fbdb30dfd33d8b4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/uplcv?utm_term=mahandi+dijain+photo+simple PDF link annotation
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/bf1880416dc7a80e6d99a62a9af9f812/ritijenexojoxa.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/zoverilebadetupedawiz.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16093a0137398f---28831174817.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e79c5c69---18505865084.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b97528888fe---2831538213.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a68227bee25---xewenawujokige.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/b8ef6ffd0d6d3879b52965985687d17c/16881879789.pdfIn PDF document text
    • http://k1a.ru/images/files/file/lojute.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/nilesajalozujixalojaxo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/m2mqno0qske7ea5rm5r2nqta72/gefezuvunawolenupomerew.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/57fur39i0gorl6d14mhp9fcs97/60403030121.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2680b8d1---43944677634.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a040650f703---42576289845.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/97902980804.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772cb5ed54e---88991891571.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a196df7eb69a9f833ed5e52ddc1c5412/vutimosogetilabigamujuv.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.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_off000108c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C6 5184 bytes
SHA-256: b11e987b7aa3a34bb8605130e9dd9c09a7f90c91b214090c8ec219d85120c70c
font_01_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 11568 bytes
SHA-256: 716d2e28e16807890a8bcda76e74aa32418919d1964cfae3810f0a4ddfee288d
font_02_sfnt_off00014121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14121 6620 bytes
SHA-256: 28020d63c46cdbf4262f437c021ccdb19064c7d0ee42934927357ffea557f5e8

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