Malicious PDF — malware analysis report

Static analysis result for SHA-256 f467be8bdce07ba8…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 23:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a1f28e69ddc5b799551573e0651bdf66 SHA-1: d63a16089ce985b81dacb376bdfe095e2294b85d SHA-256: f467be8bdce07ba801d2255f1ab494f29dd67addb3b9719662b425f694a6f418
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The presence of link farms on disposable hosting further supports a malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0124e174c3---67975655451.pdf In PDF document text
    • https://securitydm.rs/slicice/file/78263845256.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/ziwedafizezugimotez.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/tokorabavivusenubagupaf.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/lezebegu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1b7648cef22be58d941393012769ebf5/rulilepewinel.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/23896802221.pdfIn PDF document text
    • http://phongkhamtamthan.net/uploadeditor/files/viruvexufukudubexuloveduk.pdfIn PDF document text
    • https://ip-pharma.net/data/files/22581754344.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/7a506c93fd4e755db86ecd170fcf1086/43978668436.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/vufazezo.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/mudebonox.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/84239216594.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c4d22b79a41b627409b068b1b96c2a4a/70765583824.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e7fd955a3---29529836.pdfIn PDF document text
    • https://coevent.ru/upload/files/kikebubopiwe.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/xovixev.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fcc2314556f302d244cbf9d4552ceab7/gamapaton.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/2629381697.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce49b8e3e4---62628975193.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610a2db113117---58340751019.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be83b028bdc---20899274786.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/hbe0vftdmg1e2o9dt6t6qmjfmt/42672096709.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3902d13b---wagitisopazi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2033d3b37f---lovudobizegitenama.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210801190034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=john+deere+2640+operators+manual+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_off0000dc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC97 11248 bytes
SHA-256: 3405eec02d7db08fd1a7c6c55dbee34b080042e2eabce0efa7551f0a51fc44d6
font_01_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 17220 bytes
SHA-256: 3b3eeaf3b993e5d0c912203a25ebc7f56ac6b2fbb244cfb7a309126bbc25aee6