Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0202f842957e336…

MALICIOUS

PDF

69.4 KB Created: 2021-09-15 18:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3ded07a35e642ffdf9444611128f7174 SHA-1: a6029aabb6e01364c7ced5dbb90775047bea84f0 SHA-256: c0202f842957e336dce541c430aa5b2c63839ab40944077014425a173db5453f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=descargar+instaladores+de+juegos+para+android PDF link annotation
    • http://moscowfashion.net/content/xuploadimages/file/sowak.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161331b1b8e4aa---vadugulolelawilax.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/vupefonawifekiv.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/mabulujibo.pdfIn PDF document text
    • https://akemi.ro/hirek/file/71166547705.pdfIn PDF document text
    • http://ingore.cn/upload/files/58698766467.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613006a389ff7---50453946567.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/vawanowel.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210901160405_OTUyNDEzNzM1NDA=.pdfIn PDF document text
    • http://htygroup.com/upload/files/sasix.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/jituzaputivelaxozoso.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/vopufikudowusawajetusi.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/tisotizugokofawomux.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/38237183381.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/xikibuxozarusubeju.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/fesaten.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021090322004173.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109081805554376.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/tanowamamokivirekiwoj.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/kapizipotakogomepatomel.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/10495571034.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A9 16032 bytes
SHA-256: b20a6fd63ba84d98dd07ffcc12640e421b353cc2a66233afb3df3cccd50e8869
font_02_sfnt_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 10920 bytes
SHA-256: dd087e832879db2c8a1734bbc1740a4848bdce9ed5d4300e58f7b373459ac734

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