Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf2a009f9f71291…

MALICIOUS

PDF

77.1 KB Created: 2021-09-21 23:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aca8368498ee4320c308f4e9d37ac907 SHA-1: e0aeaae8695abbf777a9e3851c8ee56baa425a6d SHA-256: faf2a009f9f712916dc859bc18f3908280306f671a596618788c5b96053f4fe7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of embedded JavaScript further supports its role as a delivery mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=download+gangstar+vegas+new+orleans PDF link annotation
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/72283613634.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/wugoxezeriz.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/xegigademowuvomoma.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/53014425057.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/goroduweg.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/67472220353.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/wijimobewagegotu.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/fiwelebaveferawegeb.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/dofitulidiwolulini.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/63196923157.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/13359915417.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/64556273324.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/81277338002.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/rojatewofodivaruj.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/retaxalabuf.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/duduzuzejujejo.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/salumaduxareduregu.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9e3e3a3185db4fa40a71be570bda1a25/lusowutanajivoxifeb.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/vifanavobiganupaxuwujurum.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/kadigafovu.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/wemurezezilimako.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/16667539113.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/xiwakagebejexu.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/62988727566.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/danusukimogogilepu.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.

FilenameKindSourceSize
font_00_sfnt_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 10484 bytes
SHA-256: 32da0de98c85b74a6bb55c5ba36170d6cf7cb8c062c406dc82dcf4a56494d19f
font_02_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 17416 bytes
SHA-256: 49167efe434c84d5456d4e30269dea4daaf6f3c80e93a620ad531035766135a2