Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ad2a72ebe646bf…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 13:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fc2696eb75be1f78414a7b0c3c9462d5 SHA-1: b2cd17ae93e230883c7763025c20028f2648e4e4 SHA-256: a3ad2a72ebe646bf912166b2e7383638bd84585707c7e6a7efbfb6c0742832fa
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ClamAV detection indicates this file is recognized as a phishing trojan. The embedded links suggest an attempt to lure users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

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 http://web-news.eu/www/pkpar/userfiles/file/80166609010.pdf In PDF document text
    • http://valsadindustries.com/userfiles/file/vufofalumujiteviselilifi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/811vtdtoplre5np1e8bm326r17/34398709285.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/wutofiler.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a1647---34053511948.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/87217746845.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/tipolofijedaziluwa.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/76997132512.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f236a0bddafdc77d1bf124139d0c08eb/kasizitedit.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/vijagoto.pdfIn PDF document text
    • https://virker-ikke.dk/files/fidogenobababefofeta.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/152350423590.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/75326704287.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/mi4cps86lqaqdpr1glpsb60s31/37228065230.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/47e1ls2ngr2o5ao069gtuthfta/1560552678.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/sajowodorawufoxebafubines.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2jfasiq04afcmnimeakm4ips04/zarutagolajomobuxumad.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/kerugowag.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/66544247274.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bd20df1dc---49465783582.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/mesogogejitasugugakipege.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/fufasanepixunanepegelow.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/72418024284.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/kajezumumutonag.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/f2tt2162k8nemrpbhph2qbbek6/kawomosizumiten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=vademecum+homeopatia+pdf+gratisPDF link annotation
    • 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_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 21604 bytes
SHA-256: c87112fe54d22ad07732d2162f12a67f42fb151de8b9b02ed829dfafb41823f7
font_01_sfnt_off00013a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A67 10988 bytes
SHA-256: fc075036bad5a7ecf3a2755201b0eb5e7b1b738793b7c3b7e3ee9260ddb2041f