Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b009fd829529c96…

MALICIOUS

PDF

84.8 KB Created: 2021-07-03 05:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33e335c3efa14e5522ad789430059fb2 SHA-1: 0ca82bf000f646eef7f3af6f634a1287b05f6480 SHA-256: 9b009fd829529c9638c36b7279322ccd3b6b28525281a1f785c06c4283b4b726
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/38a80b8be864fd3607fcbe7534407118/93325826182.pdf
    • http://bright-mineral.com/uploadfile/file/2021052805290644.pdf
    • http://auroraenergyproject.it/userfiles/files/saganokosu.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de85081788---tuzetepitaxuwoludemazi.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/18872641040.pdf
    • http://eprdel.cz/userfiles/file/16922475577.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708c8c923ac---72046551793.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/886c4ece64f2f2ce4579204338c68b79/31698127467.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607411fb75a4d---89044282353.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7be4ck5qb76kpl8ildrb7ad22n/78916164663.pdf
    • http://osc-pribor.ru/products_pictures/file/dadipolamuxadowutusipali.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/9b8b06f0e60f5b3e051c74100539d18e/jepimele.pdf
    • http://worldplastsolution.com/ckfinder/userfiles/files/42269237908.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e1e26218c839b52bf508b85e874ff7dd/zupofolejagu.pdf
    • http://ristoranteibucanieri.it/userfiles/files/vonow.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/83718221906.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db53610498---wowes.pdf
    • http://ithalattagarantibelgesi.com/resimlerfiles/zomelefizero.pdf
    • http://bet-balance.com/userfiles/file/fenazajutuzalamurubima.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/01fffe9feccd2044a34eca77d0da8cd0/75864830505.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb0ea4fe9d---45892659185.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/776eadaea3eb16e3e5c690836080c11b/20810878654.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/j189t5npup7mso3sr8lbrn7aap/ziketewenojo.pdf
    • http://mitcostruttori.it/userfiles/files/dufazisap.pdf
    • http://seednseed.com/admin/fckfiles/file/lomixufito.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=indian+books+on+cross+examination+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 16792 bytes
font_01_sfnt_off00010011.bin
f230caa0b835f2f99716a0944e28f3c00eb820d51fec78da4e455c04709cfc75
pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 16984 bytes
font_02_sfnt_off00012c80.bin
747e034acf36850062a10d08d74d295fa6e44a072a5a6fae09fed50340d9e2a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 11020 bytes