Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8591c16fdf42da6…

MALICIOUS

PDF

79.7 KB Created: 2021-10-04 12:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d504c31224571e84d525d94a5c7d3804 SHA-1: cd4c8ac5cb8017dfcc7531f115830dc72744dd9c SHA-256: c8591c16fdf42da63d5bdcad9cb3558baad2323b5bde4b10dad81b0f292e09fb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by ClamAV and exhibits characteristics of a link farm, containing numerous external URIs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of distinct hosts, suggesting an attempt to distribute malicious links or content. While no scripts were explicitly extracted, the PDF structure itself can embed malicious JavaScript, which is often used to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4650

Heuristics 4

  • 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
  • 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://soles2walk.com/data/file/55977565605.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fe9cd3f75---xefebulafuriv.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/73774121688.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/lanijofowibofolalesazo.pdfIn PDF document text
    • http://scoutpate.de/userfiles/file/68556155221.pdfIn PDF document text
    • https://sanagustin.cl/files/99902460653.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631922506.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/62551695464.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/ladabebuvukawotelisasina.pdfIn PDF document text
    • http://fruitsad.pl/images/file/pibuwugu.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/73859599779.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/21200078626.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/16253127301.pdfIn PDF document text
    • http://es-iyashinomori.net/yamituki-n/uploads/files/rasigul.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/17979779137.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/82153870007.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158a36403a86---xivexeribiviwilowi.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/wejikakilosuwizagitufomu.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/91398772538.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/jurimagufar.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/jumadafufoj.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/38845376634.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/jimufegozipulabet.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/fubajinabuloput.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210917050223.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/10222750150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=set+for+life+winners+2019PDF 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_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 19508 bytes
SHA-256: 8c7568b7c868dcaca67a13c1cee6219daa8b52e83b5ca6219459b1d48fc6a4a7

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