Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a4bb3e82b2e3f2…

MALICIOUS

PDF

81.9 KB Created: 2021-09-15 07:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 228949ca68c5c4f783ea046b4466eb66 SHA-1: f07c839de30ebc6fc2743835de02ff4eaa8040a9 SHA-256: f7a4bb3e82b2e3f231adf7a15b45a855fb699b2cec85b6efbab24fad0fef7d69
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that act as a link farm, likely redirecting users to download further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=manikarnika+hd+movie+download PDF link annotation
    • http://asupuro.com/upload/save_image/files/64797056561.pdfIn PDF document text
    • http://schokobrunnen.com/idata/71295102892.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/vobagelosok.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/89409518767.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/vojotetuvopuxifotuneseto.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210912065401.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/tinorozibad.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/jaxinuwojegema.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/rasujanulemurolusopukov.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/45926540983.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/jiruwuzovupozox.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/bexisagezulo.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/77813253091.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/riromisewafawoxesipa.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/guzef.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/fidesodivoxipo.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/zoxewuketofewofuxiwo.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/56369544579.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbd1241a49---botowinilutebata.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16139d5c3cfb16---87937194180.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/zesanatezapenunipaxobefi.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/42754072874.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_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 10484 bytes
SHA-256: fb08d882fa4dfce4e669bb81b82d8f71f3a601aa8a8a17b50f507f71b23aa977
font_02_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 17224 bytes
SHA-256: 2025b1eeb4112497254b82e48bbf47ba463742fe642795ee69ea4a1df5673ff0

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