Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b0fba2cc002806…

MALICIOUS

PDF

66.5 KB Created: 2021-07-20 12:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2002bcf5a43a6e73c223faa163ad17c SHA-1: 10e514a68f36091cb2dd55cc0ac4296764349de9 SHA-256: 26b0fba2cc002806615eea474e83d4899cd222886a34981ff9dfe58698d1240e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. This structure strongly suggests a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b7d52d30a828296efce0e7b033310211/mafufasuwufebukegajid.pdf In PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210618_1E2A3260E3D85FD7.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/06801d11dfb3b469b4547ca1ce1473b7/lesaribekujijiri.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/muxuloporipuvarozoza.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b324b4e7f29---muwoxituzutasev.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/68773905895.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/99618952518.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/20206824504.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f14cdb54d---38759046649.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/75e349d21962a413bea57224ce06909d/kobegopipajoluzuj.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16074723e9506a---33812278949.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091a5f5a3a78---23095670691.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0b89e0c7---lopatamezivumosoritovu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826efc879a4---89865555396.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8519514bc---rusosefesajoberawelofarek.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ed7e6060064f212d5af594c854a204b7/27870558032.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/12bf196ed6b199c83c1558ac5d6bcf42/38145881574.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/caf9a930f9e876db8508d1962df8a94f/31089420384.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/saxiburoriniluwa.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/oqueg48q754ua2stjgtoqld4la/dovaberemapisowogus.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/qhpi151b0t3itkrdveq9b7m3d1/sebovokifumabadipeta.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/84085457924.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/85699081110.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160983732651fe---6633851794.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/6e63db0ae98e519c4d12877b6c90a9d6/57779588471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+you+pronounce+the+word+cachePDF 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_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 10596 bytes
SHA-256: 6f91a9395f25741d72ff57441cf9d2b34856724006b14ec8b4fd6fd075a4dd63