Malicious PDF — malware analysis report

Static analysis result for SHA-256 debe66c768812c9e…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 01:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b124318ad117b2a8b04b5366f454c06 SHA-1: 2e432bb7d532af6384d1d257a75810f183d2e3e6 SHA-256: debe66c768812c9e3e1a5f5c93e3231a454ab6fef7468347310a0c3740325e93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=endgame+full+movie+hd+download PDF link annotation
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/0823b631fd785f93ef120629f3dbb7ae/84410003785.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/32283dc081e0eec1030898a21dcf556c/sisaja.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/61223549619.pdfIn PDF document text
    • http://beiks.info/public/file/busomutusejibibe.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/8tc2it6kqvug73ugmu1rlfe2d6/82870681966.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/pevowopifuja.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/69203361597.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/refoledofeforifixix.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/5do6ng99ehrdr42g5vrht0ma2u/jogubukavebozubigularif.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/93128595329.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c3bc4bc5---63234515431.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fa7b11014---wuwogigominoxumapolu.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/f3ecdjm45fg5uf3o8j2r87o7q0/wixowegaje.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/85916b172cfe4301ca59f744df22061e/balolaru.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608606fca32dd---dawipexaditutut.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/a0ba774da882f5d6b6b12d5c860267f9/bivozuzotefax.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/p68mojca7pvu04tsc23lo394sa/11627883317.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/83890121195.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/laxakutamafenivoduked.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc9d9d4fd3---24362708891.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ojtiltftnf6oaesic6sonl4i15/zupowomo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddb6f6ef3c---81346327882.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/nemazagotokibaribavafisul.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/tivupobibule.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c7bdbe477---famogakaj.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_off0000f7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 17168 bytes
SHA-256: a36d2f831a16b034070eebf0a23013b30625e4c8a8c47bc8aab1c04897e71f1f
font_02_sfnt_off00013cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB7 10668 bytes
SHA-256: 783eb60f10e1cd7a879def0970a358594f8aaa3848edd69f0f9afbcb7a543330