Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce901447c1cc212…

MALICIOUS

PDF

108.8 KB Created: 2021-07-16 08:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3b7801d5bf2bd09a9ea1117898f4433a SHA-1: 31fe0210698d4af67b3e68982fe9aef402bbe62e SHA-256: 6ce901447c1cc2121f87550d4f3a6f56727951185fb772e9c5835ed045a06f13
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting PDF files. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081c8a81dee9---43862903070.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2b104211be4a6ce6f7d1fa6bc3aa5d94/wabilotaralili.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bb4bf093d---48787946516.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160817524ccc72---wimawobizowilez.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/68c1e973c4e38f7148e6e52d8dbe56fd/katusumaxe.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/87601317907.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9fd7d45529d1215684a63d25e7a06701/sulijasugojiviwegelo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d51aaac429---vivuradarijarodun.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff2846b23---dejavaresozimeg.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/39f42c7dc41c17ee82dd6fcf2ba95023/xedomewu.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/morizeruvatefasib.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/3562535489.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/evqbgukgospkjo920c3ipq3gfa/45407485672.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608948ea0792d---fedevesawezaguxibonos.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/923d41e2faa4d26c289c20acfd9316ad/21854579662.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd53685e6a8---93921688374.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/137fffe251a8301ca4bd0d32e85287c0/51238421711.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a90a311ed492f76deba0df8164ed5ce9/55657998447.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4u4460pbd6cqk8ubgrisamprl3/50318238042.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/gikilamewevabog.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1b4402276---zapejololibokemexatojenog.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2867b37d0---70779407429.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2ei6i4qppu0da97pmcp360l671/donunemobega.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ff02d9265972a1bd040a30b415679d6f/54344805378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=freud%27s+psychosexual+development+of+personalityPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F47 16852 bytes
SHA-256: 37ade68b9a86138be7a75aa48df4585604684280d42bee001bdf8ea2d3c174c0
font_02_sfnt_off00018b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B60 11276 bytes
SHA-256: ea8449dbbfbcdf5edf5a74ef919eb044befa5cbed2828ee0d2da9ccdede3a211

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