Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d56de38bdb1d80…

MALICIOUS

PDF

69.0 KB Created: 2021-09-06 02:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4ee5bee70b8b218e872ae808907aa56c SHA-1: 9f35e6a4f4406882f9a095a82e1a15d9b7098d9b SHA-256: a0d56de38bdb1d80c69287518e2cab315110790c871622cefdde474de4056c10
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking a link, which is a common tactic for delivering malicious payloads or conducting phishing attacks. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://poddertradingandindustries.com/userfiles/file/63585392847.pdf In PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/91997990872.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/gm3eroai6cm533frvc5fpj7i76/diridodovalagupiduf.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/73c62b8aeae85d4107757e53e382d14b/zopijubag.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1630189185_5066f0b6ef.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b1624126---jifulowisufixewowupok.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/fd8facf48331015dfba474b563b5676e/zitodu.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/83469653253.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e03f0683930---19703924338.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e407a89ca2---xilupozak.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/94661690202.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/14614612315.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/70649004519.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/560b8b64b231d9c17eff6d89d419d036/womikujolenil.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/gunevulegilo.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/popizumumivusilebanovep.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/80258754340.pdfIn PDF document text
    • http://findplusltd.com/file/saveba.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/nomefixagewuwa.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/3800168076.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b478a8402a3---lenivurul.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/82168155508.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118875251872---75024573284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=fruits+and+vegetables+list+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_off0000b3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E6 13796 bytes
SHA-256: c239fcd32584a3860c9cd30b9051aa2755621333860bb5d27e811991431df1ae
font_01_sfnt_off0000d582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD582 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 10836 bytes
SHA-256: b10ac96cd7239c88ee93ef6987c2115178e2c95db36481f6fa3a29e631c3ff59