Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2a362743acf49d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-20 08:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a719b84ea72070b58412d992b3f3a320 SHA-1: 3908f2615bc7b0916c10cf5a2cad1359768c77f7 SHA-256: 0c2a362743acf49d358eb2571d833358ecb71cd51b97260d8bca7abb1735625b
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 for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://synerhu.ru/uplcv?utm_term=iphone+12+256gb+price+in+bangladesh PDF link annotation
    • http://bukharageorgia.com/sites/default/files/file/wosibodo.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/3361407975.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/1527723635.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/51072890353.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210918_619A5A0C238ECDCF.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/52349628789.pdfIn PDF document text
    • https://electroagro.es/pub/files/43292037556.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/95257443540.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021918519126681.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/48771426756.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/94096420222.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/nitinimoniloxosarukix.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/nanorigoz.pdfIn PDF document text
    • http://cga82.com/admin/File/lujejavomenomezadose.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/27297758812.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/bisibesibowamogesed.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/saligi.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/zatedira.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133492351abf---tisijulolasudodazomuwago.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/94246635958.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/9931831856.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/42716673755.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/10275240598.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_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 18304 bytes
SHA-256: d086630d016715e9ee55618d4995dd9c0811b37f598b05e6734a036f908ac85c
font_01_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 11260 bytes
SHA-256: d796b665db5dcc038919bbdbd3a4c1433ef67e68e913a8d48b3ea95088238947
font_02_sfnt_off00012575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12575 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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