Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e3fa47f188a0dc…

MALICIOUS

PDF

89.5 KB Created: 2021-07-03 07:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bd12ce92d2ca15729f6d1a72bda8e83a SHA-1: 6e7812bfd35ab08e11f64869ef0ab7d8de145be9 SHA-256: f2e3fa47f188a0dc4ae878d8b28783af17429a68d5cdd1aafb9c557b8ee260e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the presence of embedded URLs point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=task+environment+meaning PDF link annotation
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/c4ccf571ac216d267f737562c6c6e61a/33834705557.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/budokoliso.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/7265215460.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/12599639413.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/544da4f1db03284e06d10d1a3556cc89/mofuto.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/f6b3c7ed4537e8394b92bb08fb38deb2/gofimepatifewek.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/57624514114.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/zazevadekozifi.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160907a0f3fa51---bufegetafevakefatufuzu.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/9a2neb4km2jl9ks0kos9251o64/sutokopuxenev.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/gorazawibego.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mb1dh0v1s8lkpfpejo6di73ubi/60586974254.pdfIn PDF document text
    • https://makenie.com/upload/files/mezujomaxegopijuge.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a8396b83d---xesixesaxokuseseroba.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/18433640700.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/muwodufabagifelofasi.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/68059957997.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/63832558630.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884e1e89932---fupuvuxufexuwugi.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8a818b8c2---59319267089.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/lef6smm36kkq7loiikmqh87v65/43021892946.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/11c634719d66f028ec217a7761e24507/ritexafowavu.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/vunifevilod.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/0809af788b61476d2a2cff5dd9db4eab/2981304091.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608491a776cc2---furojazezesegejilalabuw.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/k8p7qkh2983mp4bct66997c2ta/80004424709.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/90ei9dlge24djmm4tmpjvumlm8/56912015209.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609304230c0d3---37860426414.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_off0000fcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 16700 bytes
SHA-256: 2bbbc9a7d6bfb4ad35c233ae560949507fd077903981ee39971d7a912e4280f7
font_01_sfnt_off0001283e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14055 10524 bytes
SHA-256: 98929ff302e3a09fbcd5fcfeba6cfe5bd26ac3460babe91733f67bf20148e8bb

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