Malicious PDF — malware analysis report

Static analysis result for SHA-256 14594da13a3a053b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-01 00:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6dc21ad2d019992a409dea33cdc8f91c SHA-1: 4bc65059571c1c6adc74c21565ff658015577936 SHA-256: 14594da13a3a053bd4f55172273df8257c4d06336a8240d6552bfaa1bb3fa529
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm or redirection mechanism. The PDF structure and embedded content indicate it's designed to direct users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://paraglider24.de/pics/fotos/1/file/66011241516.pdf In PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/2cbb80f3cc60b5c6f8549448c39198a8/7173585549.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/11953382162.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/funapefiwix.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/14858055832.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/84884381247.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c77b0d8aad---tipibusupep.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881fa79984d---losozape.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/51489856743.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/dopofu.pdfIn PDF document text
    • https://patc.fr/imagesfile/zarule.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/jozukopal.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/befadokegisadupot.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/tafekemidafefaviwikijuxo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0e090cf5c40529c161b99ffc951c216f/80469110986.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/81901854446.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097c54de9bac---jafomore.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/838820405d05ae971dee0447a59f45b2/81268619169.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1b013beb4e9dee7354d5436498590644/52785554284.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/sgbo064hq77797egs5fq3n752n/rusukidepokanu.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/d9766182d20d1e46b159e10d0131d1e2/lukafojesojavoxazu.pdfIn PDF document text
    • http://mfcpavpos.ru/file/80317080658.pdfIn PDF document text
    • http://gerocuki.hu/user/file/dixozume.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/muwagewojum.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/25589696570.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/vazezigiv.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/76284585352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=black+tail+butterflyPDF 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_off0000cbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 10436 bytes
SHA-256: e8e491092639ba1e83071cca7ad2a03c52fe714fdbd240872f18dd624b72aed3
font_02_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 17244 bytes
SHA-256: e5d686fb884900500c79e79fdcff7202406e2775d6d35e4f8295f4029aaa6f72

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