Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe4182d6fa4f643…

MALICIOUS

PDF

75.7 KB Created: 2021-09-24 20:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 741ade679c9ab60867bb73d309f74462 SHA-1: ae2afc367c44943577bf3d77280514cdad1798d9 SHA-256: ebe4182d6fa4f6438daf1f333fb49bf3e6d71d161afd6f15f175d57f024cc8ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=gta+vice+city+bike+cheats+android PDF link annotation
    • https://nocenzura.space/web/img/podborky/files/79911010419.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/wepubomevaf.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138132098fa3---tupapef.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/ratutabowit.pdfIn PDF document text
    • https://webhosting4.net/media/file/84173866862.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/bazagexenumilerovinazawun.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/vojinapowuma.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/nuvikubulemoror.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/mufate.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/12596757528.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0e2f201787d9af2fd68c78579a32f488/nebazadudatibuwulefi.pdfIn PDF document text
    • http://jaqalsports.com/files/file/37381696858.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/90554006924.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/61049200450.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/luxapilarelu.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/xefonerogebidibexojis.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614ced220fe50---metajapini.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/rotopitanijomok.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/67979636722.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/77969978228.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141692b630fc---44941102981.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/pudorokafuvotubebegomafeg.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/balizonuzesulesa.pdfIn PDF document text
    • https://sealskinz.ru/files/file/90820888482.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_off0000bcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 19880 bytes
SHA-256: afd04b3c432da756e92746e2f4cd3e6ff1a7ab62c9670d4756a2c6d01f1c796e
font_02_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 10872 bytes
SHA-256: d05a80862f770771c01f26101dd91059819af20b16c0344a6c3665a487a8ddb3

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