Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ce96bc13b2aad9…

MALICIOUS

PDF

73.1 KB Created: 2021-09-06 07:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3ac49e27699eaa7c360df62b0a04f450 SHA-1: 392f0cdcc9ecd949dc3e4d6c6ab3c571663493e8 SHA-256: 29ce96bc13b2aad97be67db60fe63282beb000abd9b6b5191bb8e168263a66f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing campaign. The presence of a 'repair manual' lure in one of the URLs indicates a social engineering tactic to entice users to click. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://inwebjor.ru/uplcv?utm_term=whirlpool+cabrio+repair+manual PDF link annotation
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/vedatokujeve.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6695eadada---83895730138.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7b7fd206dcdb103d9edc618480d8e5db/sudokomitikaxekajevugaf.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/10776575248.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/rosaxorukabudizosidi.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7a65c4001---fojipaxarisigu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/837b2696bce21388376039b337beba0a/96702085477.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5409542f9---66087854684.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089d36a72fb9---ravirir.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607103e3d4218---xukuwom.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/bipopufoxoval.pdfIn PDF document text
    • https://atrax.hr/files/xelibalal.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/40521864856.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/xawowaduvupodunase.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/55501653494.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/binedewemasosa.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/qs4lrptponn08hp1ji6gdifqpn/55019023764.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ghual5sktj6l28564ceajcdt4k/88860767968.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/50601857187.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fb8f4a1334e---zokosilan.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e0f8cc2ec0a1edaa7bc0625d3371b9df/24388015003.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8ce8990e22a7d11090709157570a7347/51936804757.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/35416220965.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf986e46f11---kajebasetuvebanefe.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/mixilamof.pdfIn PDF document text
    • http://yuha.be/_files/file/15218921078.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 15532 bytes
SHA-256: 1902f9fb6a7c456369ed07456b9be9e5803f0d9d9df000983a7e1fe388695501
font_02_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 10608 bytes
SHA-256: a4f9d97f862b06cbe921b727487a6b40d01dbc884cdbf491c59ae2cb5e2e6d8a

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