Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbff6613dfb42e4…

MALICIOUS

PDF

55.1 KB Created: 2021-10-03 22:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bf157dbbdd1cac4df72512d79efe2b59 SHA-1: 60d01fa8151c2854c4b682d55305589bdde20792 SHA-256: 2bbff6613dfb42e4b480f942fd0c6fdd32ce3381659738944933b10e6c9cffd0
154 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on disposable or compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The heuristics suggest the document's primary purpose is to act as a redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7186

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
  • 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://gopherscopes.com/userfiles/file/9604366175.pdf In PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/jdl8v8pbdsskt1hucegl69e7pu/bofawogurupuvogoxi.pdfIn PDF document text
    • http://mobil-tech.com/files/30816516344.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/jitugibapuwe.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/10109864653.pdfIn PDF document text
    • http://upakuika.com/img/file/71829432905.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/64578547808.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/82502426136.pdfIn PDF document text
    • https://synersys.fr/contenu/file/wojozisexatomulidukajuw.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/bb63a19a95bf5e1be30ee2723e94a0db/60602915037.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa877637a6---14574115587.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/13758373622.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///mademufagivujuvesizefa.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/tubugilipolut.pdfIn PDF document text
    • http://allier-genealogie.org/File:/mironob.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/wusumisenefod.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a7c2a899b---58933187771.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/28518269203.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/zixum.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/raxemufegoledoni.pdfIn PDF document text
    • http://kyokushin96.ru/admin/ckfinder/userfiles/files/78698093433.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/pinedona.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/25730259103.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/23656913334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=journey+of+a+river+diagramPDF link annotation
    • 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_off0000af45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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