Malicious PDF — malware analysis report

Static analysis result for SHA-256 29032efda2fb7a3a…

MALICIOUS

PDF

90.2 KB Created: 2021-07-03 00:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e68c0b3ccd5902e3b2f2795fbc94116 SHA-1: 8058cace661749b899d67301641854e03a84730a SHA-256: 29032efda2fb7a3ab9a74fb0683cd6822be41777d3ec6af23ce9ac7bdacbcbc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. These links likely serve as lures to phishing pages or downloaders for further malicious payloads. No scripts were extracted, but the structure suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://drafthe.ru/uplcv?utm_term=finite+and+infinitive+verbs
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e96ba48829d739ae7d412bde25121137/24550479160.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/cuk1j92m91g28huk962g8eqr73/63067969976.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/744aa4af70ba2ca6034d0d9464aca1fb/duguso.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7709a508ad---38499944486.pdf
    • http://rainbowcaterers.in/userfiles/file/paxexuralesuxibag.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/53c9cf43e8d73eb89d12120b13073eff/39345828298.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/551b31548dab9a96d879314bd0437b26/80890293227.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f8dadbd69c47d816a510798703ff9a9a/78447194740.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe40d589eb---393069488.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/e52fil0rtf2931s0lj6d11m0ii/gulifuledokujulemopab.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba2a64191---98454700804.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d4a80bd15---mupuvokisakatiwol.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd61fc41027---vebaruwewivexapob.pdf
    • https://shop-ecobati.com/medias/upload/files/vofepodozovebikarulak.pdf
    • http://yjsyrj.com/userfiles/file/jewovuripupow.pdf
    • http://www.gesas.it/media/mailinglist/file/fedepegusu.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/40e0375c9af380b8c44d298d8d7a6ffd/bizama.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a46fa0c122---zalevoxitaluvav.pdf
    • http://mid-europe-ex.com/images/blog//file/xetudu.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/bs8n0e8pvttk4jqog997v0dhrs/rixaxunufenokagupexi.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/867b04ad133c8d17c2598a560725142e/26250257186.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/m2qcb31htuc9nrffjlsucl17kh/nebajelagatep.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd43b78d2d---1781780874.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb0667bba---nojepomazusimagelimulin.pdf
    • http://jyotiacademicpress.org/uploads/file/94422713330.pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6efd6e5c47c83a1ea748cadd564c4f35/zupekoxodatupigujuloxo.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_off0000fd38.bin
eb2eb1f95f06fd7fff74d7acae4122d60a4cab73e7066664b05394c219746e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 17524 bytes
font_01_sfnt_off00012a64.bin
9ee723fb415a223260d27d310d90f64777d78dd5ff5d75606ecacfd3b6e2abd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A64 10364 bytes
font_02_sfnt_off000141ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141ED 16792 bytes

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