Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9814a2d4e2ebcd7…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 20:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d786d8fdfda5380fc337815652b751cc SHA-1: e25d1e2a49dc69cbf47b0d31077957b2fba0449b SHA-256: b9814a2d4e2ebcd7a8fc05cced732af0f620de73a907ca556fe3bf07f91662d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous URLs and the nature of the heuristics strongly indicate 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://irlanc.ru/uplcv?utm_term=deals+to+cannes
    • http://absolutelyneon.com/userfiles/file/bimomoxorekazakij.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/m121g13qsmlgcu79f88tio25tb/82977186379.pdf
    • https://alamansyria.com/userfiles/file/74522087361.pdf
    • http://kemenyseprosiklos.hu/upload/file/23984421446.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/76099753158.pdf
    • http://kiszelyugyvediiroda.hu/docs/file/74949303783.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/mbkk1eb558ava42f4olsilp8r4/20080891487.pdf
    • http://nacyc.jp/Upload/file/33944574748.pdf
    • http://ahkjt.com/upfile/file/61995929050.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8501cbe2ed---45597920763.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/qo5n1ils3e3c0iqan9jafm6059/56615308851.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/p9vvrunji86n16sv6117cb8ec5/87623216335.pdf
    • http://bjeclinic.com/ckfinder/userfiles/files/4278373052.pdf
    • https://purefeeling8.com/data/file/murajetu.pdf
    • https://cafemocion.com/userfiles/file/wokibudizetidipanunor.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa40063c57---45683011930.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s8l3pgj6uepsr3o5mke24ad334/gugelexuxep.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b33fdda84---lodezanidaduvepolu.pdf
    • http://rayanchem.com/d/files/webetonekideguruluxetir.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/i75rukhnj16p91g5prus9opob2/59939662919.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/tg9socff0kmhci506f9qf3p5j4/83640584531.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607e144482c0a---89958541031.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2fa6c634a34b3ce81bb71b507049f38c/51682903063.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb1e2b659---9638186262.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_off0000ea4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 16792 bytes
font_01_sfnt_off00010261.bin
8d69932b6397b8dffe8ffb2ee75ffb27d954bee467678f87c72d18ccfb895589
pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 17756 bytes
font_02_sfnt_off000130a5.bin
2f5feaa74824bf9511f12125ea03ee6a741142cbae78c8b7586fd7c0f1aa9b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 10032 bytes