Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2af149a1f9067a…

MALICIOUS

PDF

94.0 KB Created: 2021-07-06 05:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ea2e052de39ef72b00a9d0e959abdd19 SHA-1: 40664385ffedc67741e73dc4dcd0153e28c415c6 SHA-256: ab2af149a1f9067ae301f1b359decade98848d844f7f9f2b718d1f0c279f0d3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised CMS upload directories and disposable hosting. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://allytemp.ru/uplcv?utm_term=best+roblox+police+roleplay+games PDF link annotation
    • http://dush-kz.ru/uploads/fck/file/79298395186.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/53ccde94dd5c7d932c01f61ac5c2132d/sobogakivitipunepu.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/a95fc226ee5bcb30ecfa21acce219338/fativawefiwatomoxavala.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/81560869544.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/sozesarekiparosetalo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a7a2b0a36---5898023044.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074fd97a0bc2---sanamofawatoge.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/dojubogozulo.pdfIn PDF document text
    • http://envigest.cz/upload/file/fumusabolefiramug.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607259e7b200d---80031692762.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///66054926560.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1a49c18355a5fe8f6cef6be92aad8bc1/67645349429.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/75590759691.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/e0610c05a07f5d1a525eaeb996732686/fexusaxalexotezevufuzodej.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/23408027189.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/74588688511.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/lifigakitamajud.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/zabexasipapujemutugere.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098eb88e52ff---tebumogunid.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/80259691662.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/dodokulazirikanuxatif.pdfIn PDF document text
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/54314647229.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ku2l9lnli54ro7bu6igo57u6ts/defezivamuwowiw.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/sedesevebekabiputodel.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/36987735863.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_off00010ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 17516 bytes
SHA-256: 3b58953ee8a8e95a521f92e50312b6082f4b837c9e58d12ed4e08cd0be0b35c0
font_01_sfnt_off000138bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 11024 bytes
SHA-256: 0f6185d559f4c95fb0ead3f16241db0cedf3c692f83bc6a349f87c8ea338b504
font_02_sfnt_off00015250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1