Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9acbc6abb2b525d…

MALICIOUS

PDF

77.4 KB Created: 2021-09-06 20:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2595e912e33e44693cbf01f0fa4c2f7e SHA-1: 418291851803ce88bc91f6c75e60bd6eb642af8a SHA-256: c9acbc6abb2b525d50a34e9d37ac9cb0267adb2c8e23646b5271eba71beb3860
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution campaign.

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://asbazainville.org/userfiles/file/boxelonuvelapimevopidas.pdf In PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec53d5ae0b---dibiligakipe.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d9abc4ee0b8b978de17043b6110f40e5/91488979028.pdfIn PDF document text
    • http://52963566.com/upload/file/202108141202210913.pdfIn PDF document text
    • http://travellerisland.com/files/16058147425.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/gasagusojugudodaxekesavu.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/45646044492.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/nagalizawoxugawi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081c68e4457f---35333063424.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/npfn4a25jeae2unbnf7vaa3fb3/tuxaf.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/3768d4adbfc1ecd51f75fb3e98f19ef9/41744688384.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160790f8cba7ac---75729850179.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/1lrifer0hse7uabqbg8scn8jok/magonuzamobifuweme.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pjhfnrhpggmisnuvbas7c2g73j/20099210819.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/tuxovug.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/jepatutikufironu.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/37923975618.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4b9uv7er6fnn6ds77i8clrt9ej/41573104312.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/bujuweronogat.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/75180598317.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fcaedc0aa---2564460305.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/b5hsdllrucbksj564loamcevc2/41322111399.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6528e977f0---53152048658.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/53832807455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=osmanl%C4%B1ca+dersleri+y%C4%B1lmaz+kurt+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_off0000c5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 18892 bytes
SHA-256: 495d6f1a7229f7da75d182977118b1709201fad591d955f9f319d9d90298b47e
font_01_sfnt_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 11096 bytes
SHA-256: ce67e3a91c834fc7e9c0f5c9cd4c80a13fedaca41277c93374c73ffff90f4493
font_02_sfnt_off00010dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1