Malicious PDF — malware analysis report

Static analysis result for SHA-256 2953dca1963ed018…

MALICIOUS

PDF

75.1 KB Created: 2021-09-20 21:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 07fc458a07fc3fd5d226f42fe731daf6 SHA-1: be88d8b85e3b65e3ac3c1e2f3a436979a38ec334 SHA-256: 2953dca1963ed018597ddc5bbd44a1233c4b85552ef92f26071ad88f89528f29
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=forsaken+world+apk+mod PDF link annotation
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146516904891---fufaj.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e31f7741fba38554810bd48f6da264f4/38276226008.pdfIn PDF document text
    • https://webrobogo.hu/kepek/ganiwukamidogesa.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/xikozagijen.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/27484819031.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/fjpa6bjr92n2lbjmi6c8l9ubt1/segugokodifavezufuxebib.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/85295816857.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/golomikudijemob.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/batonajeladiw.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614673ed62fd2---8462379923.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/57680818035.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/31619070270.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/76630576014.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8da2e77beccff8a2ae2d33d1e18e7d07/wipovopodare.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/nazivusupoki.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb27a45359---nozupimewupape.pdfIn PDF document text
    • http://lsmtrontractor.com/upfiles/file/20210902175907.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/rukadokefosivorerazum.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/84964232204.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/98473848001.pdfIn PDF document text
    • http://minhanh.com/files/tenofi.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210909_3E6B31D5A44C8987.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/gevirejomobaditufise.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/45905104657.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/67903178610.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/tojuxoriromolemar.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 17528 bytes
SHA-256: dbb803b11a3fa2c69a5120758fb770671a96861a1b992a7ac91bf4976789b070
font_01_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1