Malicious PDF — malware analysis report

Static analysis result for SHA-256 1245b6a62da6e325…

MALICIOUS

PDF

90.1 KB Created: 2021-07-25 13:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b67f61760398b0551fc7969fd9b85147 SHA-1: 7b1a69aff65e23061f3eb433552074b685b22bbf SHA-256: 1245b6a62da6e325a05afe6092d2443f145f2524163cad5948d81ec34e53f730
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The embedded links are the primary mechanism for this attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.1534

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://okuninka-biale.pl/userfiles/file/wawavafow.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082120adad4d---98140267108.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097d28bf0b3a---92079686839.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc6259f41---kewimuwesidujewajoxe.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/14006411048.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ams0t7lm24n3cdja47ug4ltal5/gekukowolelu.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/julerabaxabajorum.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e29ed45410c---24675113668.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d14d64d6---vevulowato.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/e394dugs9ot7l94ogkocca65rn/87995101234.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/b2b0b00f981236cca2b087aefad37c7f/28511568965.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/12745756397.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/xajasiwifopemegewunuwe.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/3nnp7mse4cavgv58qp61fkgv63/66737922774.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/genezenatogaruneko.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091da612137a---fuseketedemijafita.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9a4da3567---9101609755.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/nifibulofomikitetapi.pdfIn PDF document text
    • http://iworking.vn/uploads/files/77717017678.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/fawutamekatetovukaseb.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f1dafc6c48718e801afc6da4470c478f/74320733547.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/2619902467.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4c11c1203---71247937046.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/35934574171.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b76b7bda---17610849315.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/89218236528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ethio+telecom+adsl+setupPDF 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_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 10660 bytes
SHA-256: 9e3f7ed36b6ac6d51c9c5f7a2c2567eb99bc9bbe1b2fd08f2d89afd2c62334a6