Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df189f39562f197…

MALICIOUS

PDF

68.4 KB Created: 2021-09-28 06:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: de1656cc3a3ca758c5005adf9b26dce7 SHA-1: f8fad0232d206fe76347af972d6659f79a1e2cd4 SHA-256: 5df189f39562f197bdc16905e59264706c14ac18285019b5fadd37365bd515be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially compromised websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=watch+below+her+mouth+movie+online+for+free PDF link annotation
    • http://salespate.com/userfiles/file/monizopakobufizutirep.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/dipimafavemi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7d1a61afc---vosovu.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/83463624523.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/50621256537.pdfIn PDF document text
    • http://arablift.net/userfiles/file/wizumi.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/pokt9tish3keakbfebgc416qq7/31801482594.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/45083220322.pdfIn PDF document text
    • http://remobudostol.pl/pliki/nodedodezoronululudeti.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/18467984768.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/35057496004.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/70315386355.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132db971e7a8---5150781066.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/xudaveloxu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4d83nr064e1s80d27cppfi38jk/36163068255.pdfIn PDF document text
    • https://mauspro.net/upload/files/27591014299.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/89616175504.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/bejeranunujupitemata.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/poxaburakoje.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/12882268774.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/11475600797.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/11853389911.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/mutiputederonaze.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/vadoxo.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_off0000ae74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE74 10816 bytes
SHA-256: 114623f9319813c845ea51f5121ab7c8e9ee324bb611245db5ba1ce006488c18
font_01_sfnt_off0000c74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 14508 bytes
SHA-256: 75cefd766423b6952a79b54a7bc77b5cea84ce531815234aa7a5e7a06edf6cd0