Malicious PDF — malware analysis report

Static analysis result for SHA-256 976d61c05684a26d…

MALICIOUS

PDF

71.2 KB Created: 2021-09-23 06:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7bc5008427548a381fd6e803479547f9 SHA-1: 0d45cb8a41f17bd4ee6e68187365d7115c3b2e87 SHA-256: 976d61c05684a26d641963dd81169b8f8848c5247322ca5fbd785c19e8afa3b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=download+townsmen+premium+apk PDF link annotation
    • http://i-harmonics.com/upload/files/mamatado.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/61664780254.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/waxagun.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/50268415171.pdfIn PDF document text
    • https://avflash.nl/upload/files/fiwewuzawapa.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/21784712469.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/4d166823f5a0561f6323cf87e3887b09/tovuroburejo.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/28204494270.pdfIn PDF document text
    • http://fruitvita.com/files/files/vofenubez.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e6c76e85ad34c43ff7c125dc0e52df99/lokozuvoraxelowo.pdfIn PDF document text
    • http://sdes.in/uploads/49527930533.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/91277036378.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/xizekogibavabimagatanezu.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/1796419170.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/jobedeluwusox.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613651de18060---16006666707.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/16955748776.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeb4a866d6---84190728945.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/64269838621.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kutaxupejatiwa.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210919_28371AF64A57D1D1.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/58899043818.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/21108907913.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_off0000b3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 16812 bytes
SHA-256: 90f0810720f1fa80e22328ae67ceb9b52734bbac52c6e21f1e6c382ef6adbde3
font_02_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10832 bytes
SHA-256: 432496c5ec415611879011c089fcb27f1851fa7947e5de5eb5bca56cd62828ba