Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302a3929738f98f…

MALICIOUS

PDF

77.5 KB Created: 2021-08-01 10:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c9e291e5f6adb096b8fcc6993ada0bb1 SHA-1: 38f8b36c37242e0dd729cc89bd2e68ce71c02fb2 SHA-256: 9302a3929738f98f154ab7541c23e021b3eee9f9e3b75b04316491639e7ed18a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pistant.ru/uplcv?utm_term=korku+filmi+dabbe+5+full+izle PDF link annotation
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/i5ddg494hgsop9fo4unohgv49m/95848283913.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/96389423611.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b7fe3223---37768889668.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ffc64559bfc8fc5a96155833a02cbc65/19463778431.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7fghkffo4cug14l13c8ba25c42/lepebi.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f77d0a6a3a---57309818911.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/535eaa18693fc68a52ac74bbe29680e1/83280708673.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/nekowekesokeperumirozeweg.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c333343f0fd---62832951612.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/zutuzefamirix.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/2fb0273736c76f5563c8545cac2ef597/15724943141.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/zogokipinetepu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/471ede3d1c1d61cf3421bb075bfeb866/31995437144.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f2ed4a9f4---13855517742.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/31344803448.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/zanotabul.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/68426742920.pdfIn PDF document text
    • http://air-con.ru/upload/files/famuz.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/88267181435.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/84461430943.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7f9e5cd9---manuvititivipodofube.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/pupagekufe.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/l3mr8posul0on3s3dnifhtpm1h/nafikumizigisatupof.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/f7pa2fe546kfnm379d37dmtvnc/57307989545.pdfIn PDF document text
    • https://premium-house.uz/images/file/defexadenuwuxa.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_off0000c88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88A 10660 bytes
SHA-256: d3a0ac39bb3242b7a59e0b7d59552728c83d8ac091b11f4f4da688d4ca085019
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 18300 bytes
SHA-256: 19f7f637c90915fa2120c4931284095c6f082ac4859d8c5af2971c5f339eed79
font_02_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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