Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d41b2f3ad614d9…

MALICIOUS

PDF

86.1 KB Created: 2021-07-05 23:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ef93b57a5b6c30738e8d116c678239b1 SHA-1: 14da8a233260939a425b234c5b5f7f24745ff7ac SHA-256: 29d41b2f3ad614d903d93d10abb4f39a31965810a3d6cc7203385642a77e54fd
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Numerous heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable domains. The document body is heavily obfuscated and unreadable, suggesting it's designed to hide its true purpose, which is likely to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=sound+waves+transfer+energy PDF link annotation
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a10d25c79b---97273598110.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/denenegobudutedaxofu.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/s5841uqjn6dar8t512b0tsfuku/zaxazizugosaxov.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/iuigmbqv33t3j1lqdvt0853u1f/vixidesusikuxafizixi.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/dejenemezona.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d756e737918---19141866073.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/kevosizafitulipajabitu.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/mb9ir1mruikuhudjcpmiprpemc/50341783741.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a859dabaa41---17114841834.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/49534311087.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/95337921893.pdfIn PDF document text
    • https://alutat.com/data/file/femejop.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/77891816697.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/13eacfd7b771e0ca09b323d1e1dc17f3/junuparuweweloda.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/92606924975.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/8b746fd47464e9b9e835fbb4c5257d5a/51937885615.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf896e554e---towivipurijeke.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///sowulawigujes.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/pbhl8m06vvmi19nfe5p7esonqv/25029837843.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/kobezixegumifu.pdfIn PDF document text
    • https://ambalatender.com/upload/files/9393681832.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/70941911120.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ac7e05a82---figefumujifisike.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913b167cf49---87961958435.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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 17776 bytes
SHA-256: ff3ab84482fbcb2417b31ccc924841efff401bbb7775ce81aa731446b1312f88
font_02_sfnt_off00013235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13235 10832 bytes
SHA-256: 75f7d4992df367c663a5a2459fcc667a8dde1d09aa39fd65e9875a8213716f10

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