Malicious PDF — malware analysis report

Static analysis result for SHA-256 079bf838a8961e24…

MALICIOUS

PDF

91.0 KB Created: 2021-07-03 21:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0c6118caeb5817047205ed98f64e212a SHA-1: 3e7981c0d411af8651f9de17a5d13909ebc40bb3 SHA-256: 079bf838a8961e24953eec3cd13d03aa97ba90cf9bdf55d24506145be74a499b
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, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The embedded URLs and the document body, though heavily obfuscated, suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160762597ead24---zonebepozomokifolomefis.pdf In PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/6gepcrmvf9ca898oaun6hqu1og/16554424730.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/govosokoxujopifaxe.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/55e70216ba08009d064ec26095aec9ee/nufigezexakudukupisata.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/vbsd31lshu7vbrmojd3t8bdc27/lesolidevikinesufamisoget.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/02aaa27514cd53f56476b7461663a987/5781621766.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/3d37c67e0e1361658b9a19966d00c370/35465939808.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/tudenudup.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/zikewas.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d18c5feb8---batekum.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ab3e7f51651c229bc276bd966e8ef333/kenozetumisekinafuzefa.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6da49d304---3499653677.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/f5c28ea25d49dc6465d6602917181a26/morapuxovagojidixu.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/12774633494.pdfIn PDF document text
    • https://areicon.com/images/file/kekojejudifuxizemuxudomu.pdfIn PDF document text
    • https://sbufficio.it/file/96108030321.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a84f96821---48482428547.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085869deafa7---dojujugej.pdfIn PDF document text
    • http://ippon.lv/uploads/File/dazepefupobametepewepanu.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/df11fcde594d4e4d276fef40e5b551ec/35115148227.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/aafd3d79f4f3b2e51b48128479b10808/dabevazenuzozesanom.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/zodikewituxodifeno.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/85727330004.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1760bd8b0---49573037901.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17e85cbf7d---94984517744.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8f28522d0177b0249b6d5b2ee2b4848f/mupigozowoka.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609002ab90ed4---33111580830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=resume+objective+for+fast+food+crewPDF 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_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 18004 bytes
SHA-256: 37d4745fa1fc2e4a923893ef8e41aa9d74c7a62825207a6840ac7119032947cf
font_01_sfnt_off00012c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AD 11052 bytes
SHA-256: 2f9afd954c50f53a562dfe12962512e3869b14d974e709a212bb08c162534721