Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cca934df3c91e56…

MALICIOUS

PDF

78.3 KB Created: 2021-09-03 05:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 69fc4ae3bbb603985e2a641c60e2f234 SHA-1: a2c1f2a281e5fb88ae7326720996487d8e6c8c2c SHA-256: 4cca934df3c91e56241b3df4c77a4a03a051db511ba48b3db65c0893b4c08286
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 phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely to lure users into clicking malicious links. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=traducir+portugues+al+espa%C3%B1ol+pdf PDF link annotation
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f5ca65d52---40902777951.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070111fe519a---48925973490.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a6fbbd0b0fa3a9b905c217c727787fb2/92764758647.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/wululezosamipedozesenebo.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b4102cc124075c1b237e0a2d6efb145e/kupamedirififorumudefudez.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/xovusoxadibunidipo.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/latadamigige.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/baretunufuluzozugupax.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5cv1r3oqs9apm35u655n6r72er/jofakutixavajar.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7fb50adca---rezevupikupakoj.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1610c1868358bb---1942866693.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc70a6229a7---sasulidalitapow.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/jufasexusutowat.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/tugalemazurifovelutinat.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/levilabudewajiwimerik.pdfIn PDF document text
    • http://espokebar.com/uploads/files/mujutidujafojefe.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acee044f0e2---46491365400.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ekuker54844rpnud0q9ob4mc0u/66588071834.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/zoruduludikedesu.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a67bacf37---59011456926.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/rojopekufikozaf.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/katimifomepizefibefikajur.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/sukore.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210827_021230.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/jidozewubadarewar.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_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 10960 bytes
SHA-256: 656f1b1ff656d0518a8616a79ae41c311ab7dbe17763b2f5c0cf0a9f01e12d91
font_02_sfnt_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 18612 bytes
SHA-256: d4aa88ba809228396598a86874243158fe1f562c430700ae66c084d7097d2deb

Open this report in the interactive analyzer, or submit your own file for analysis.