Malicious PDF — malware analysis report

Static analysis result for SHA-256 281d97a6d0920240…

MALICIOUS

PDF

93.0 KB Created: 2021-07-31 21:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 25034e8e03eb6ec534083cab5f8c1969 SHA-1: 693faecc0c10634c533d92ecbb932511baa8fd09 SHA-256: 281d97a6d092024054229ddb5cd1e33b14ae04854527b61b1cf98bd721d54ab5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URIs and link farm indicators suggest the primary purpose is to redirect users to potentially malicious websites. The document's structure and content indicate it is designed to lure users into clicking links, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://huntic.ru/uplcv?utm_term=what+is+the+eligibility+criteria+for+b+ed PDF link annotation
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/34848212060.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/60936537929.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fd2656758fe---sibafapekomusimiti.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072b7a571779---98051296649.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a697a5ef665---3223794908.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/kvcph7fu591j6qgn1etjk5ct3l/zabevefes.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/mizojivatog.pdfIn PDF document text
    • http://greenreunion.org/clients/f/fd/fd69eab1634eeea6368acebbe5d5cb0d/File/nenexonepewezum.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/07137de0eeb2d12283f1db8657a8a997/tewaferuludarifetarutepum.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2d60f0ee---82488738536.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/594edd95bc7be850d2e58f16ef71c106/11583123633.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b26b7dd59---livevuxudaxal.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/15821483931.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/mugosefesuju.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/75601642548.pdfIn PDF document text
    • http://hzqzg.com/d/files/80558866344.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/belibufazaguju.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fadb6fe2e55---28403498361.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/98290351905.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3936858321---95817230759.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d3b26559---61153089444.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/i7clc8gl3sj53t6gmfi3m97un1/lulisuzaworitoxaluremusi.pdfIn PDF document text
    • https://farstaslottsvik.nu/anvandarbilder/153/files/wisarokowobi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073dbaa550ea---7160561602.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_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 17156 bytes
SHA-256: f0eda80141f4a23a27449de93588626c95ef533c55ecb168da9e9c362fa7886a
font_01_sfnt_off00013295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13295 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAC 10900 bytes
SHA-256: a6027fb015e6974c70023d8273b96e1a1fb4556ea50cdfadaa4e274a965ac674

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