Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b1e32108b36639…

MALICIOUS

PDF

63.7 KB Created: 2021-09-24 05:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 593aab5fba5c0e26ac3b88b168a438a1 SHA-1: 55c62f8a7a5059123675c2793efb8763e67089ef SHA-256: a6b1e32108b366395f935cda847d3a1f683fe12b142becd259b714332e0a0e8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

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://garglob.ru/uplcv?utm_term=sami+gaming+8+ball+pool+mod PDF link annotation
    • http://ndemal.com/publish/page/file/6630220951.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/56468414170.pdfIn PDF document text
    • http://thaide.org/userfiles/file/52245657416.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/12690757101.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/34538125971.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614971155b995---6746174104.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/tikibajupomefonopavak.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/89534612490.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/66574780193.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/jigikuxetapomeded.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/1597846373.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/fafotumuveguli.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/97548256607.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/80528309350.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/besunodusigazatonedakix.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/23648663192.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/57099740295.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/e7d9f8535389452705ef724d647465d6/wuxuxobakamow.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/koliva.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/94938217074.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/dnf5i8ho5kkjtsovhgsbegpso6/nokove.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/novulevu.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/farunabirajerawi.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_off0000d842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 16764 bytes
SHA-256: 8548630a0f617721e592995b285d797e4ed5629948684e1962d450372b09a786

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