Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee0032ae4859a93…

MALICIOUS

PDF

89.4 KB Created: 2021-08-18 10:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5bd9597d8058bfb2ad6accf75b3a9be7 SHA-1: 1dd276268d7c89655804c8ea47ba8d55d773a14b SHA-256: 3ee0032ae4859a93a0b35c88f037bf58a9c33f3eb6ddf0c3aaa19568d9776f6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, including compromised CMS uploads and potentially disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL targets are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://alacarte-design.de/userfiles/file/5672728870.pdf In PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba7b1b9e38---36538321954.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/mepevegofibakojiduwi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bct1nsnd809d1nguilr5kqngu6/83629056137.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/81807424577.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/71ff6a02bb5661ee138c09755730ab7b/serapapibidajepubem.pdfIn PDF document text
    • https://etimes.mn/uploads/files/davoxo.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/54337058710.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ltofibk2fuvu4809rc100lvt2l/dajanaxemixosifidaz.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/6279582013.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd1b405173---99137114496.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507b06da86---miguzixunomegav.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuzamimobojixavelaf.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087ec125ddd6---53029078970.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/dd4f49c30b6fcee12281b496f8c8f199/soginopeterudusonomup.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///wixonozilibeto.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/78980650873.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/pilodaxir.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/79642496120.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/pusaxunaziza.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/pedino.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/dvkul7phc8fiitocc5vk6424b1/letuxirepobokijena.pdfIn PDF document text
    • https://digireg.gr/upload/janebapiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=making+bohr+models+atomic+structure+and+periodicity+worksheet+answersPDF 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_off0000f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF454 18524 bytes
SHA-256: ce4aeb989414067aedb9cb8258cdf2e84003433767c7160378758a41c6e7dc16
font_01_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C02 11484 bytes
SHA-256: 3e28c6d775b065184c53dc77b24afbd2cbdc636471494beb0dee3ed3b1a79996

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