Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fecf78a5f80ff1f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-10 12:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c507bd9f2d7feff27fff175268ddbfd5 SHA-1: ac98accc9f48442d3d322f80658d0212e97aaf32 SHA-256: 5fecf78a5f80ff1f5ffda0a2f251e1d9f36200a1fd00f14b6592315662842fa9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of link farms in PDFs often involves JavaScript to facilitate redirects, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://balbu.hu/uploads/news/file/1600191845.pdf In PDF document text
    • http://tandartsindex.nl/images/uploads/78062841409.pdfIn PDF document text
    • http://davcpundri.com/css/file/49301601032.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72816678891.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/82379413728.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/wunakuvariketezuz.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/gimudaleg.pdfIn PDF document text
    • https://aksusu.com/upload/files/29105043700.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/feputol.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ee8b1ee7e---bexipaxubogo.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/verevowegemeninogerike.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/75601275728.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/88078555418.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/xotugawatojagomibepe.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/xapujetorovuda.pdfIn PDF document text
    • http://taksis.lv/taksis/userfiles/file/kaxejabonetelekatazado.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613492617a513---33050055226.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/65830054956.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/52883718577.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/81991780126.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/85525276250.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/12276481221.pdfIn PDF document text
    • http://school15-tyumen.ru/f/disiritotuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+take+a+screenshot+in+note+10PDF link annotation
    • 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_off0000ea4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 10624 bytes
SHA-256: dd466bb789791ae323ca0550788a212c7256c8f46f05dc4a597d2b5c481e7d7f
font_02_sfnt_off00011ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 18296 bytes
SHA-256: ec40f65da8a8e7e8f899215c71d124ff1af56df94a71084bd9b7500d8b73fd1b

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