Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63112635504ee70…

MALICIOUS

PDF

77.8 KB Created: 2021-09-16 02:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 59168f6c3a28639a3db8895def39d5f8 SHA-1: 588be3c8ae0bddc4dfaa896b61fbeafa000f62f9 SHA-256: d63112635504ee70deb8e2bd54f7e72af21899db968752a76f8cc7a838d3cfe3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=internal+audio+plugin+no+root PDF link annotation
    • https://jagamimpi.org/contents/files/mafixebilofotevo.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/73208950992.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/17035624184.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/67198282867.pdfIn PDF document text
    • https://akconta.com/uploads/files/27784395797.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/31811793493.pdfIn PDF document text
    • https://cooperspick.com/files/fowowodafo.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/86669703340.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/91970991270.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/gadamusiveboxituwakisezuw.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/74494184376.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4680f71a723ae5f993a75a6d7ce6285/gifisewopizuvi.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/dijevakexowepevoveku.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/jexizasogi.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/15443621318.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/94745611167.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/zugodefamun.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/85544452911.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/50780614294.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/kelenabi.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/70011932493.pdfIn PDF document text
    • https://blugarden.eu/file/31922264028.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/lupimaleragifavifiwiz.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/rapurigarugiga.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/82863049407.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_off0000cb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8D 17804 bytes
SHA-256: 0d79854e3735009f2a9862abd3ae66a3c4dcf903b655f83fa2c431b631933fee
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001120d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120D 10448 bytes
SHA-256: ff14d762b185533abb5f207fded95de440cb827bd6e361abc284aeb584323220

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