Malicious PDF — malware analysis report

Static analysis result for SHA-256 174eba92e77cd48e…

MALICIOUS

PDF

71.2 KB Created: 2021-08-11 19:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4755c6db05d14e201a16dddec1befa34 SHA-1: 6e2a27a0e061fe720590f03ac82645f9ca5db9cc SHA-256: 174eba92e77cd48e8f73c524cde0f53fdb1b5d246c68598ae6317eec1e939cf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload locations, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution campaigns.

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 http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af48e93f885---bawufagufulimegex.pdf In PDF document text
    • http://talleresjpg.es/img/file/dalubemerimajifov.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3592ed98f---pafijavapufuwibabolu.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/totogebetudarabo.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/77q48srmqbsk4csrdi2ulrvdp5/vumajami.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/suruweme.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210712_2051F64803AE9195.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a56c29a84d4baae84b7c4bd6d32c8085/vijolozuluxobemido.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626758157.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/lukerolok.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/vivisozaluxogufutovize.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/62914752164.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/lakoposedavevewefusariz.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/rusaraminebebewetajebadal.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba70b6b2b5a---tonesoxegadizegozazewo.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/4v5l9ot905deaulvc41mfvr1cq/24765416087.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/56747679260.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/xonolumuriju.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e01dba09c---fidarinesufukibogijofek.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xibekej.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b9627832b---basinubowujowew.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/371e03b1bfda24015ab2e96b0a070b03/votemotatofawodunofot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+make+a+hierarchy+chart+in+google+docsPDF link annotation
    • 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_off0000b7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A2 15060 bytes
SHA-256: 7d6580db90cd8aee6cf2461228b3c151c4f398214ad6ae6d28f4fc9673a0caf6
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 11100 bytes
SHA-256: bfc1408b44c5afaf0493f61ec2fd571ed4e9d1fa9725e7dbf6f11153969b7a76
font_02_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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