Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a3c60e11d7ec3a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-09 15:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 644d0df75c81b24594cea6209fc38ad4 SHA-1: fe5db0ad45977e90e7dd61118a49c52a5ec29dbd SHA-256: 95a3c60e11d7ec3ac18391981432cde57fe91f092ac37a7ecc9e93673b9d42f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'download quran app for android' UTM term indicates a lure to trick users into visiting a potentially harmful site. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=download+quran+app+for+android PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e6588641e---18828155138.pdfIn PDF document text
    • http://elskenecologie.nl/files/64474021951.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/tuxafepuki.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/90357423130.pdfIn PDF document text
    • http://esejsc.com/upload/files/lidokugarevetazir.pdfIn PDF document text
    • https://superchills.com/userfiles/file/64375859642.pdfIn PDF document text
    • https://photofetimages.com/bigodalu.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/bowuzilasivabadavamoxivef.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/rozesedevelofaralota.pdfIn PDF document text
    • http://uhorder.com/upload/files/85457506696.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/94966291693.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/47219062481.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109050615578083.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/sipomolanivavuvigufameber.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386b622f44f---kolilarufeb.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/31643210196.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/savino.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/joxogobev.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/66b127f0279589972176212b6ca4f7a6/fowuvujijibejedes.pdfIn PDF document text
    • https://panoramabyty.cz/content/dewugipejil.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/99892893673.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/13605273960.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/jijidasegubuxujovoxo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f475074aa3---12673154370.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/tuxivij.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_off0000b8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 16920 bytes
SHA-256: 80b028c6dbf9bc4e8de441533ffbeb748e16ddcb1560c62117328b57c0330364
font_02_sfnt_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 10424 bytes
SHA-256: 9cf2f84953cb88de5b62a0788e36a8b7a8ccbbb3b86af8017ede451a33ad7119

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