Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e622a7718745dc…

MALICIOUS

PDF

93.2 KB Created: 2021-09-11 08:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4caaf6886808583fdc5238db5a17ba1e SHA-1: 94c3e1a7cbdc62b9b70247658815ccf4d214129a SHA-256: 96e622a7718745dcdd543423bfd78115fd0642f1b3dd5c60043769f667d39696
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://medvor.ru/uplcv?utm_term=yify+black+widow PDF link annotation
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133eeba79b03---77612651689.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/311d6a1ccef8c3004db59436e137617a/pasuluxojuna.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/nojuzexuromo.pdfIn PDF document text
    • https://porfic.com/fotos/file/nipunivafosejudifote.pdfIn PDF document text
    • https://esvigo.com/upload/files/kogesowenezugaxufusen.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/buvoxopiviferomatok.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/79490295086.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/30150450131.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/95356305449.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/1ec09ed01a6e7bb3fdf76df3cbb9f8c9/gonibetelebimifupenawik.pdfIn PDF document text
    • https://rinducm1.com/contents/files/mawasenufotebi.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/wubupiwenikasomowoxa.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/gomesokazugobilogifi.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/xivomizivabilotog.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/wadimiporawolusap.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/84969641266.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/41692690977.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fae3402e---2340951141.pdfIn PDF document text
    • https://fundoohairstyles.com/hairstyler/images/file/dumizurozapewuvafefifoxo.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/18f511d1a4a1e5bf42153c6261252483/tulajatimelabodipojenobot.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/fabilefokux.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/33585785928.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_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 10284 bytes
SHA-256: 1ff68d5585473d09d981b7e03c20d70b9a25c90b018f38d4e5008b577fbdbcfc
font_01_sfnt_off00011c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13486 18956 bytes
SHA-256: fb436139f67a12fb19560012ded8e3fabef83fe63ee4957bba21e19172143a17

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