Malicious PDF — malware analysis report

Static analysis result for SHA-256 794582753bd2f377…

MALICIOUS

PDF

80.3 KB Created: 2021-09-13 11:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: d378333e5b2b89f5b49ddd869e4ddecd SHA-1: 8931d1ff58d6aed59c577b6e76fdb8a1f55f48ac SHA-256: 794582753bd2f377349197a40131d9ed7224a79d43083f24eff2d4cbc5a23fea
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=2019+sat+test+pdf PDF link annotation
    • http://problemconsulting.com/img/download/files/dagidigomu.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/42449193855.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/fosiboga.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/vinazukujowoxaluru.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210902/file/16305812793259.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/89257094658.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/97752017716.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/28097218922.pdfIn PDF document text
    • https://maisonforville.be/documents/file/96875447108.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/wemejevosogumapelat.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/13277795918.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/3973598542.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/79960704674.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/xoxujumirix.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/34951221346.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/nupalojunosus.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210907043426.pdfIn PDF document text
    • http://kelvista.lt/images/files/28084519579.pdfIn PDF document text
    • http://gardatrans.com/content/Files/fujuxox.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/823010321.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/pinazorixirekadimulajazum.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/lagaraxabe.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/72755781282.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/gefaxediv.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/tuxofiserawuferawifironen.pdfIn PDF document text
    • http://lblussana.it/images/file/mazawipolo.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_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 16912 bytes
SHA-256: 55ab0c20a6fe97a9f46cee61e34d4079bf8d33d1eece8f6f29d1ecbf1a76893e
font_01_sfnt_off00010399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB0 10392 bytes
SHA-256: be35653b8729609c5020a3c49ce419969edfee1ba167ab28f63799ea1756c5c4

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