Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1af60e0fd47936b…

MALICIOUS

PDF

93.5 KB Created: 2021-08-21 21:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4e366d39c1ec3f3ecadca6fc98922e87 SHA-1: ec9936d66b3adee90a47dc1bdae65274d466ee99 SHA-256: f1af60e0fd47936b637000a6cf8ccc802c02afe05975373d27959b0a8fb0d786
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports the classification as a malicious link distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://rszm88.com/upfolder/e/files/20210713042313.pdf In PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/jopufonoturo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092205d9bddf---33417876229.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a2b4524c2---jazamililigufixefovi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/pututugasugopefub.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/nosanep.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966ed229a53---31155054836.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/1fgjhb7bauflg6fcn1s3uearj2/71804179829.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/62777409742.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d9ac7b29---gavuvarufeva.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607312ece2276---1927542481.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6augh4p802a4tiin7h1rfn49o0/47530758168.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882eeb77713---degepumifetigezena.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086aa7b2db53---dojixusoji.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3dfb73599afb7db5568362364d1c138b/gejixuk.pdfIn PDF document text
    • http://fitviewer.de/files/file/xuvasadadomug.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cfjno1i69ig8cmk7d0j6fjt4ht/7555845566.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/70000734891.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/kizujopimini.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/l3biv481cur94dpnscn5dgho6u/11204794525.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/xowuxerafemulenebiforedov.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/nekobafarivumiwokijiwa.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97b93310e---62809935716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pmp+certification+all-in-one+for+dummies+2nd+edition+pdfPDF 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_off00010906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10906 11036 bytes
SHA-256: f86de15859992bf48b0c8b6f7c178b777d19d6ed14c6b2c846195209f172817c
font_01_sfnt_off000122c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C3 17180 bytes
SHA-256: 12c9838a354aef5d6ad0ad5338b99cb4b10e75517b58c8803951ca067d8259f2
font_02_sfnt_off00014f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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