Malicious PDF — malware analysis report

Static analysis result for SHA-256 066ee2d306f00441…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 02:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2269c62fd99ad37eab79167e5aa5be38 SHA-1: 4d2b1a46c3e15dbc6cd2938a5ed7e0d3d829a185 SHA-256: 066ee2d306f00441aae0827036448ed42f12859ff05054f02e3e8604bc97414b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Numerous heuristics identified the PDF as a link farm, with many external URIs pointing to compromised WordPress sites and disposable hosting domains. The embedded URLs likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=what+is+difference+between+ios+and+android
    • http://giasudaihocsupham.com/Images_upload/files/dutulufatobejavesipumu.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a94515cd0b3b322e979fa58ba8bd205f/26773906644.pdf
    • http://kunjipsc.com/uploads/files/85654156038.pdf
    • http://dayou.tw/uploadpic/files/202109031213456321.pdf
    • http://stroytehcentr.ru/images/file/13820154136.pdf
    • http://vizesblokk.hu/files/file/javemuzukeximewil.pdf
    • https://cebubigsellers.com/userfiles/file/63307882258.pdf
    • http://reichspfarrer.sk/file/xanatafogeritepux.pdf
    • http://rayanchem.com/d/files/fesanelemusekij.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e862a88fdb---57124863079.pdf
    • http://mvdeastudio.it/userfiles/files/meponip.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142d45b84f0a---faxiresimofob.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9d89fc4fdbcc388eead7411b4f9c456f/wuduvobobegujekur.pdf
    • http://bulgankhangai.mn/userfiles/files/96062265031.pdf
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/tolijisixivo.pdf
    • http://travel-door.com/userfiles/file/xelagasobiwuza.pdf
    • https://mtmnetwork.net/uploadEditor/files/96959884654.pdf
    • https://cakkue.com/contents/files/kizuni.pdf
    • https://bagstyle.uz/images/file/38965018974.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1613e50b6b4a9c---75664121339.pdf
    • http://splogservice.ru/content/file/vajevav.pdf
    • http://we-women.de/default/files/uploads/file/pijavile.pdf
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210912_9C836FC491BBE9E8.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_off0000b1f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F2 16792 bytes
font_01_sfnt_off0000ca04.bin
1cd363c5a85be53b00b942a876857b84d0eae762ad66061d0997b841ab0a4a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 15548 bytes
font_02_sfnt_off0000f154.bin
e1720ecf45b2bd469f1382bb3fc7e9ab5ee1f360ad8c479449b94fe95b3d4ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10744 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.