Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ae87a4dd48f613…

MALICIOUS

PDF

89.6 KB Created: 2021-09-07 17:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4d59d168baf47105c29e55ee8b165486 SHA-1: 0dd12bb0f35a0035f43b42b6558766da27381c27 SHA-256: e0ae87a4dd48f61331e06c3b8a92728026150d6aa4d93b1ab5223f1af738686d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://europacreativaeuskadi.eu/files/galeria/files/59256000719.pdf In PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/10044100380.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743b4351d43---vuroterezovukipuribab.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b711d335---salazijuki.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d082c1db16---19000290012.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/nunuli.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/detiwujagurezadom.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/134904406.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/2268465944.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/63884ac4dbbc6b23cfc060f3eda29eea/94090085539.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/jbp4taedtha5qf9888brb2jou4/pademowenokibezamosedovo.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/nokojutelitozetedu.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/larovot.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f61374e0b---5892945739.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075b6bcb8762---xibafuvisubuxatibodajona.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/vokufen.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/64273652986.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161080510bcb99---6402598250.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/mctqenr2hpcjm8ovqid1pj2pk2/36286118884.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/2561272748.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3d0554340bbc066b2a092e05eb437b10/kukudijerumomojikokovi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2b286508---52572008441.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/vulizigokigekuxi.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/palekepukek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=safety+security+and+risk+management+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_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 11176 bytes
SHA-256: d8c83b564c394144bb941d4156e68c16fea3511c1bd2e7e1e0e4525ad28c8156
font_01_sfnt_off00011042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 18360 bytes
SHA-256: b188fa1ebaf7713000d9ce0d82aed974cdf60c66ca93724331e3c93b6cd93d52
font_02_sfnt_off0001405b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1