Malicious PDF — malware analysis report

Static analysis result for SHA-256 0151ee1969d744ff…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 19:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: efe4a9c0f242e8ec24bd0abdff3075dc SHA-1: 784001f2ed8a5d1e6e072b848c5a6c0b74fe0a64 SHA-256: 0151ee1969d744ff6afe83dea9863e2e270f460601ea3e16b98c29e1b9577f06
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs and links to compromised websites, suggesting its primary purpose is to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a deliberate effort to host malicious content on potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

Heuristics 5

  • 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
  • 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://queure.ru/uplcv?utm_term=cladogram+practice+pdf PDF link annotation
    • https://ccichn.vn/data/upload/file/9708846956.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/s8ck522qq7vrojc80hj657hjvc/81682745753.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/60915150054.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b3a8a915e---sumidupazu.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/temixozazevalejazowimujis.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/sanes.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609916bee705b---rojuretidanep.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/s5j6teg26788lf7mu3b4v56stp/tanipizepajudidibu.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/26928197111.pdfIn PDF document text
    • https://datajournonepal.org/files/tuterowitefulel.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/15089585669.pdfIn PDF document text
    • https://migger.dk/userimages/file/67290906873.pdfIn PDF document text
    • http://faithartists.com/clients/877397/File/3289706884.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o40rkp6800nabb2g5aat6fkko0/8078660441.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/2c5d9668ecbe4f88056bebcc0f5d6c61/xovigix.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/27368578161.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/muzetapekonuwameforin.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/53782225312.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/2cf157c90215455373dbb148f0f95532/5331612812.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/18225320429.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/48688d822970f310d5264095848ed710/75498983654.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/50989591727.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611368425ff14---36003108628.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/17479413438.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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