PDF malware analysis — malicious · fd074e7a1ab0c2a1

MALICIOUS

PDF

72.7 KB Created: 2021-09-01 20:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 4f3c8e64df9f55e02c7f234f1d5aa7cf SHA-1: e96e4384597f38c8ba873fcabd8630de15172e3d SHA-256: fd074e7a1ab0c2a14104f95bf299b76a6e7de45e2775c0ac099d3b2bf774638a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The PDF structure and embedded links suggest an attempt to exploit users through deceptive content, aligning with phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=diff+between+casting+and+forging PDF link annotation
- https://surupaceanu.ro/ckfinder/userfiles/files/77987577719.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3c010af00---34848195303.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g23u5vtobuo62kmf2ehgp7ldb5/vadujuzawuruti.pdfIn PDF document text
- http://n2nlah.org/UserFiles/file/9349244607.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/c69c10225cff286633193716854a3ece/pobiduxenowif.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c94dc3ab6bc---27688547822.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/bijefofipeki.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fbff3b2fc61---31371770312.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/360c74dd1861fa5a47c132e4ce6132c1/fekexarabezexe.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfded36bfa---wunodarebovolifogujo.pdfIn PDF document text
- http://valleypainclinic.org/userfiles/file/28486034962.pdfIn PDF document text
- https://designclarf.it/file/41860643502.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607679b65777f---1486107860.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/qus11hp81i88g5pc6tth0ujo95/2077759680.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610ba5281f4e7---siwuduxitasem.pdfIn PDF document text
- http://surveycook.com/upload/tmp/202108/file/17799260422.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/caa335ca0569f2bba44a9427b87d284f/56070218018.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160867592c9321---wikeboxasofesijivejadu.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles/file/97640932941.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/10s276reoj13g1mjk1emtal185/1086959885.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc34cd8c9c---lonixuwefebebiwepi.pdfIn PDF document text
- http://richmediahouse.com/admin/uploads/file/vamivuwuxuwuwi.pdfIn PDF document text
- https://upbfassadenbau.com/upload/file/wilibozi.pdfIn PDF document text
- https://grandiosieventinuziali.it/filesUploads/file/60309244273.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c779876a5379cf86f36316e568f8b019/12980954860.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000be97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE97	10832 bytes
SHA-256: `66e4d0437b56b9b766f39e22436c13ec35b9646c583bab515f2d6f9c5cd72b50`
`font_01_sfnt_off0000d796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD796	14732 bytes
SHA-256: `86202fb0b5f6569cfaf24df11d67dd7f0b6214d67187988a59609f198466b88e`
`font_02_sfnt_off0000fba0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBA0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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