Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5959c9f2d40620c…

MALICIOUS

PDF

88.1 KB Created: 2021-09-01 12:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96a1d1635c331896ba7ff54b459c2d23 SHA-1: 734c77a010b1c462cb299c480a01fb4da908898d SHA-256: f5959c9f2d40620cd8cbdeae66ee637adb466ba43d3f002fc893532952631574
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure suggests it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=interest+on+taxes+owed PDF link annotation
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d75238c8f0a---29999336241.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/parolad.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/1e9io13a3lp5fjojbrkhcg1bd0/80946064231.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608425e7380a9---67453407800.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/pagugovubizilu.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/f58b5f88b1a006805e93c1a2d0a196ca/11131404638.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/vovodapuwilodefatufavose.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077385379cf3---tutaluxibilokegetewidut.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160fd3fc08e927---lewojasulegozibelofovugo.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/96174656163.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/jljh0ea1mqqimo84jbrv7cuqe1/69936984729.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608309232f3d1---5598708258.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/ff8decad18d07fedb87d2fd86104a07e/simifegefuxuvukimulo.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/90811488461.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bb3495ecb---zanaradefamosusu.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f50ab7f9b---xebinaxiku.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/99987597682.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/murofajovufisefadupo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/u71rvp96bh1burske9qguc5ih4/33696369746.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/479bf12b4aa490b80023693098464f49/94177393426.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa056a1bf8---fipopelexoludinuv.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099d35f34d07---52447749984.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/zixuwitudal.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/37023410850.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/gmss8gvojane98j6jjbjlpg536/fiwatajokagugevexovidujel.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_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 17884 bytes
SHA-256: 86b7ac057e3770bb46af7cb5b3fd86efccb3494e5fd67e752fb9bbdcabb9f5cc
font_01_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2C 10240 bytes
SHA-256: ba48c54bcb8a6779773bf827ded668ae030bde3e8073b22c2dcda3ab2f483fef

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