Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480801d604ef33f…

MALICIOUS

PDF

78.4 KB Created: 2021-09-08 05:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fedc74781bf3d5fe1f70759b55fb19c0 SHA-1: 672ada7dc38d7b697e89a86740925e68b9c2e59d SHA-256: d480801d604ef33f42d730caae895fde8f59c5b10f44cd71c62aff02ac1acd4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The embedded URLs, such as http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c425463e9a4---63993089600.pdf, are key indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b212e8fe9---43540232754.pdf In PDF document text
    • http://edu-family72.ru/content/images/uploads/file/29391241479.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/33386e7b22188137286c8e2b7739e796/gikuseweseduliwifimosoxa.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc14c9fa0---bajawipefunadawuwodema.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/59195289775.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210816_1C86DC573FBC6BA6.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/brlfte90hlinfjon37k3i4omoj/51598662104.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/fepukeronedoruzar.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c425463e9a4---63993089600.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/lakumelanegepomivefo.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/mofukumajutub.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/36793813161.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/62737611662.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c36fcd0b0---lozewuk.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/38d6da8a01b4bc4691e30cdea925dd02/69985343494.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffe00d51fd---21534154489.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/kanisarezawekerodo.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/07a8idq9ac8pv0i21ecel16esb/godulabanaxukarigonenipo.pdfIn PDF document text
    • http://imaginove.eu/data/Files/35495851129.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/rbr1qdriauv2insv71280oh6i9/15539938671.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/12368188742.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b296818fff---mawenunugawusebilowuvatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sound+of+silence+piano+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_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 10588 bytes
SHA-256: 8741bcbeed4bcea4a45e060354d5476be56123acaeb3bde080633f26f1d2743e
font_01_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 16316 bytes
SHA-256: d042620fe2636e1b43cd56962a7d59055f5a6507259ef03a6eef5b2c67b1c3bc
font_02_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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