Malicious PDF — malware analysis report

Static analysis result for SHA-256 0204ee75a6a67bf5…

MALICIOUS

PDF

94.9 KB Created: 2021-06-26 09:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eca4cc8f9c89d6134c0d70cd487d83d5 SHA-1: b5e23b6a77b898608c6a6dfdee4e185b4008b85f SHA-256: 0204ee75a6a67bf55b08cb66ae312c943d3c1142242e2d59689faf124bce7f2e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://apoiotelecom.com/imagens/img_fckeditor/file/dixusinikiwu.pdf In PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/kunasif.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/4l2l6c1mcn673ugf4sm2tvnmn9/kobur.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/42128091661.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83bc12fdc---zoponole.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/633207c53d3448cb7d1e1b3ae66b2b82/gaduzipilobemalomer.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/rujuzobejovowubiza.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/ac02e50c565fb6c57e911cb1d36c71f8/83638408468.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4269155ed---43909772767.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9eb2d4beb---lefutemopovigetabik.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/birobemokuro.pdfIn PDF document text
    • http://hodori247.com/uploads/files/70917365870.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3c0793eb8306418e3837a9e47f09a21b/95570739699.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/20205601291.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3520b637b---19707048509.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/zakanifajavipi.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/zizulaxanedasadovijevosi.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16071bf1370afa---45233122898.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/7qnfn7dm9tikfp9t670s9c1582/5435171821.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/930180956353f21dd50606b529774dd7/71531056231.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/34700959126.pdfIn PDF document text
    • https://jobtiara.com/files/files/87200692478.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/vn9e7blghjv0afkhimq8na2op6/39053912518.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/tonaxazumovopapisog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=notion+template+weekly+plannerPDF 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_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 17656 bytes
SHA-256: 791b6591b20ab1f8b5219be30713cba6c69d674e112a75f18c038dd0ff72c5cd
font_02_sfnt_off00015675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15675 10516 bytes
SHA-256: 228d2debdbfdff430d7eacc933909eac81f1f4de458bfabc177cea9b8d38d059

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