Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94700c5ff13fc38…

MALICIOUS

PDF

83.5 KB Created: 2021-08-02 20:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a915343876cddfcfb5d7b7aa3545a3bf SHA-1: 75aaf48eabd4c7a670e06ae7d10b5ae1a3eb7f9c SHA-256: a94700c5ff13fc3835f1c163fcc67c9cb537445a7042181d847605b9cf5778fa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to various websites, many of which appear to be compromised CMS uploads. The primary heuristic indicates a phishing attempt, likely to trick users into downloading cracked software as suggested by the UTM parameters in one of the URLs. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3232

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://np-laser.com/upload_fck/file/2021-7-7/20210707154312726163.pdf In PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a76aee8b40a---37308382191.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dutarofikazerikefabez.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c192255039a---giwatudizidun.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/d112c716d7b01f23371c7b82df3bbe66/gasupopunixokek.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/59798105773.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/46271019696.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/66363247298.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00deeca36---26351000589.pdfIn PDF document text
    • http://olympusflights.com/files/files/59124337365.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/617d2317vpj2qmcce8bk3vkog3/jilodoxozobitodasebo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161079bf4ca3e8---31303783639.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/92007032098.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/18523888610.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/j6f6t5o6usi7493ep8sm6na9p2/53855642922.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bdad11379a4---23657123442.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c22221eb9---24937230806.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///58101326650.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7e748e9a147a95d79e773c02526f7565/8325886418.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721e1d909a1---fapejexef.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/48167602868.pdfIn PDF document text
    • https://digireg.org/upload/91135766526.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/d80pe2ht4qlp2km88p45ndcmvo/nepekuguzinetotisosupiraz.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f99fc64a135---datugi.pdfIn PDF document text
    • http://debden.org/userfiles/file/jesananifivakuxoxixo.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb8d2b49f---vewoxomofevu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/1923887d357c467053b3fd928e883d5e/vubilurop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=filmora+pro+free+download+with+crack+64+bit+windows+10PDF 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_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 17716 bytes
SHA-256: a53fe877282ef8f21cd1a6a40b18674797724c9265164bad7a7e94fa1b05532f
font_01_sfnt_off00012f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1