Malicious PDF — malware analysis report

Static analysis result for SHA-256 96703008f92947a9…

MALICIOUS

PDF

78.9 KB Created: 2021-09-06 11:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e19639a48dfb71682dcbc813544e0749 SHA-1: 6f988449023a16e002512894da6745515d67a5de SHA-256: 96703008f92947a9d9b1c5ad62f162ac84c11fe9d37c13829e4bfe19840b630f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm or redirection scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ce653d108---vemerikutotajadezifatow.pdf In PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/senolosagidilukapajer.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/bufewuputesufeniwad.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9656d353---90351241083.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/vflglf9g6bl8puo1dig5siiuh7/90203545638.pdfIn PDF document text
    • http://sakra.sk/storage/file/46794524542.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/jeberarijexakim.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/2503356227.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92409d6c0b---12648124597.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/pipulov.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093a6c01d2d5---17298492787.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/mikirimowazodorebesozixa.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607a43d122237---puwarabakovuxegulezejizo.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b3fff2ae7---5916165714.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fafce0e655e---99704548810.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/1sugcsb4lpjk2jls29e3khchtb/xusatijinofab.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/tevusod.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/mimexuruxexerifuwoger.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/lusujowuladam.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fbcfdb1c34c639c01410100b76dd93e8/97271774735.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf1c18c3f---janugezavuxodito.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/78f7032d43c1d103f0c9068390902dd1/zavixijuzokefowe.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/lutenerodakow.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210728_090843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=division+of+fractions+worksheets+with+answers+pdfPDF link annotation
    • 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_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 17524 bytes
SHA-256: e02b3438b09dfc2b6d0a5e33c9a707bb93642c764bccca429f94e818b1065365
font_01_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 10916 bytes
SHA-256: 1b0dd34519d18f7bdcfdbe1a99325ea0c1b153f83a6cb368984fec84fcccd538
font_02_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1