Malicious PDF — malware analysis report

Static analysis result for SHA-256 beead8c80a754308…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 16:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af3b67c3ce9e0c6264f997a2ac109b1a SHA-1: dbf8f45cde196f1c43269907f2ad19857914476e SHA-256: beead8c80a75430813d7a87e3b51cb6ff503849535321b1f53576b99571fcfeb
164 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42797824386.pdf In PDF document text
    • http://kapsalonindex.nl/images/uploads/99232204164.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d095418f35---56901578696.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/zilaxakulugawozusavid.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/044f7f0868da714fa20677d002f740bf/basosimepijapetexagozaw.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/99564345915.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/91479798372.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/nuzuxogovejeguwovu.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a2592770c46---wedurodezopudugezega.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a01fa3a406---duzopef.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/585d4cfe7e17df037e4160a8d588c0e1/70124323319.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/25132175941.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a3026f07---84264454437.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba34c22458a---pipobetiduderulemegipudog.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/13e9f5a333afc3f91548cda06e4d9780/44700650863.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/lojufopajoputevenamune.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/176324dcbbd829aeb8b4a6cacec160fa/19311834792.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/soxigefarefobeliz.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3c8563e31---91391875380.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/goborejixikezenufevuk.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c88603ad7---guwol.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/73325580185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=calculus+early+transcendentals+4th+edition+rogawski+pdf+downloadPDF link annotation
    • 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_off0000c716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC716 18624 bytes
SHA-256: b6b2868c40b8e9193a6893d5dfa516f2a00611fe11e6a80a5a5f86feb555369b
font_01_sfnt_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 11400 bytes
SHA-256: 11acbea5d6e7c7b8ec31db704f70318faf9d1542fafc9bad7fee281ca127ba8a
font_02_sfnt_off0001121d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1