Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda55664b2921eb1…

MALICIOUS

PDF

99.7 KB Created: 2021-06-19 21:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f3f0fb6d4854484d79f64f30b8e031ce SHA-1: aa7ef261c7c99a7847ae215a3d298f970d913991 SHA-256: fda55664b2921eb184fed94a00d24eb1522e188064563c3abcabf51024958091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, appears to be a lure related to downloading a movie, directing users to external URLs. These URLs are hosted on compromised WordPress sites, suggesting a link farm or phishing campaign designed to distribute malware or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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=bengali+movie+nabab+nandini+download PDF link annotation
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4202e11ec---gesadokezi.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080ba75effbc---53347889308.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad9e456c4---72002588860.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/44u8em727ob6mbcmjo4vmosabk/bonowo.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8f766af80---maritelubobebubibo.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/gujexibiboxepejop.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f82c55f692---89062035260.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/zedanixokajik.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/23lt91fvp3odh7248fktjpnffe/dituxefuguvusipago.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/bodaporalinujer.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/jigonijipevipelelesusa.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/27481968246.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/efcfa84576fc5ecf44f5ea4ca2b99486/fogifofutizosesukomud.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8ff50166---relaxanana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 4920 bytes
SHA-256: 59e87bbf42943cea3f906ef51a7fe9f80416001bc4581d63bea917285e1f845e
font_01_sfnt_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 14280 bytes
SHA-256: a99d6cbc001f7b053315aa27d4fc334483cef77b634babfc7d9ef97c8fbf61c4
font_02_sfnt_off000137e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E3 11040 bytes
SHA-256: 730327c814f9f72273220dcca41ca713ef881200598c2f098ecd45ab4839ea45
font_03_sfnt_off00015dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DBE 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off000172eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172EB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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