Malicious PDF — malware analysis report

Static analysis result for SHA-256 467a84c0a34338c2…

MALICIOUS

PDF

75.2 KB Created: 2021-10-06 19:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 022e9e69374ece7c34763e5472095ba4 SHA-1: d31be541a7795da6699614a5a4907aed8b85592e SHA-256: 467a84c0a34338c2dd99f9dd5aaf5a947289896b923a3a3b56fa25c9c3aec4d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is part of a link farm designed to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://smidgel.ru/uplcv?utm_term=psat+october+2017+answers PDF link annotation
    • https://cyklo-wellness-penzion-palice.cz/content/19245204189.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/jenigasun.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/janirupipe.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/tugubedapojibo.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/mulamukanad.pdfIn PDF document text
    • https://km2804.com/ckupload/files/53444939567.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/06810ec527815e00657547d2804a24dc/61132714333.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/61102285122.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/bikipijifovigazi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615d2d25f1d1e---44701330991.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/gasabesevogom.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ac4028707f---14880322598.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/narilifusivuteloxelo.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/25549121522.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/92329890856.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/siwudelalu.pdfIn PDF document text
    • http://xn--80aer5aza.xn--7-4tbj3b.xn--p1ai/ckfinder/userfiles/files/korovapikulega.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/14238078722.pdfIn PDF document text
    • http://imaginove.eu/data/Files/97340233529.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/57372406123.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/sepuketis.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/denibalibad.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/84207007217.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/93859653007.pdfIn PDF document text
    • 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_off0000beb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB8 10656 bytes
SHA-256: fd36fb1ef1564e1526d7036ede77f60345d1688b27cde64f8c2977307d785d08
font_01_sfnt_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 18176 bytes
SHA-256: af488564534185e6cc5fc4f691e7ad42da1aede8582c2ec89454c3956ea5d243
font_02_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.