Malicious PDF — malware analysis report

Static analysis result for SHA-256 62503af0180604f2…

MALICIOUS

PDF

77.6 KB Created: 2021-06-25 17:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1048f225166822c774edd566bc3a4063 SHA-1: e698bb969c8e951e950490e5cc4b448c4e9f36ef SHA-256: 62503af0180604f2ee331684905f5b342c82bd2788e8114b2ed2bae93a723fc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress installations or disposable hosting. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://alacarte-design.de/userfiles/file/xujozowixakurajitufumab.pdf In PDF document text
    • http://backupcenters.com/userfiles/file/kulunutubez.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/jefafilojuvupuku.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87f60a0a8b---dexunituwuzu.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/51842246269.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/39326289284.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/e073f6032287332c48cd74564012fbf2/rugonofujaloraj.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1ff1841699ad0df9db250933c56cb556/94398890979.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/ac651c223827a07e5acdd605e325b418/kibidegoveg.pdfIn PDF document text
    • http://aimic.com/userfiles/file/29969323579.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafc86a3715---57378189026.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/365j8ectecdbseg2g1eu69nuqn/57282680649.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/7495175354.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/o7lgobl59u67fnh30f8v19sdf4/99505712629.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de303fa64---bekunawezezomofox.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc29d072ab---27637981579.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/kafasigosepub.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/83866897769.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/luzomixikatomanalubu.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/42579568084.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4c77afd3f---rajitupozipog.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607885e8a2d48---wiripiwaxobo.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/sm499mrjs6sjr0pcmj98qrk4gu/fugolovupigisaxorejud.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/digituribubez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=after+effects+on+phonePDF 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_off0000cfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB2 10256 bytes
SHA-256: a2ddb114653f86a4b933c78e8b15a0d23eb5ff528382081673be219c33162891
font_01_sfnt_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 16480 bytes
SHA-256: a16a5452fea09298be82683c0ab491f6212372f70c458f49dcdee7066924bae0
font_02_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1