Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6bc9f4ffc4ac3d…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 20:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f01382610648ddff16dbbcc326cb6d59 SHA-1: 7f04f107171c6db7dcb81949b6d26884c031a432 SHA-256: ea6bc9f4ffc4ac3d966032efa8b92be3af87a2bb94bd386fbae52c2c571b8181
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to manipulate search engine results or act as a landing page for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://irlanc.ru/uplcv?utm_term=tratamiento+para+lumbalgia+cronica+pdf PDF link annotation
    • http://smartpaintingplus.com/userfiles/files/zononasogiziv.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbae066092a---58424320869.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/memixixoxafuzanipuz.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/tibeforutiwuxegejixu.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/132600703160a656f8d3fc8.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/45582073112.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/rozukatuz.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0db18008456b77f9b96c58d1d776f934/41903980247.pdfIn PDF document text
    • https://tavio.ru/files/file/dupuxifeduganetorakuwaju.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/79376693391.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/59504905060.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/xanutekepanegabora.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/90569597801.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8bdd8fb71---80008860024.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/nujawisuzejapita.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b744137f72828d52e761e3de235f40ae/90671514122.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/2p8cajt4vq6ff4quaifvbdegv0/wanifalatawote.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/17603907157.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fc414b9a9---gawipoxajefuwoz.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/4ef04e0622be71b7fe9da276394996b6/tuwopasomokotuzav.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e8eab6b6962---71312621457.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/fiwanisotonule.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/89295167084.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160973147af674---77091435256.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_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 10996 bytes
SHA-256: dbafa89bcd18bedc6f18e67ae6e3ea4036b6b5d2354b131f3c99a26c87f01ef1
font_01_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 17632 bytes
SHA-256: 9de52777a0a490548bce6df56f79a70c4e20521441406e4fb84acf08f7917506
font_02_sfnt_off00011d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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