Malicious PDF — malware analysis report

Static analysis result for SHA-256 29447fd44a7a4d53…

MALICIOUS

PDF

123.2 KB Created: 2021-07-01 22:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e039e9994b3ca99c1fc393c3099fecc2 SHA-1: 67fe26769d36932bc19f3932cbcd4bc76841e155 SHA-256: 29447fd44a7a4d537834183b641b4be2c23dfc0010e16dab251ea7598cbff63b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for credential harvesting or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://maasmartcity.com/userfiles/file/dabenumomev.pdf In PDF document text
    • https://businesslife.com/content/file/vinuxizuwiwamebigomuvilo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1f0d6e2bfdb436ffadf9607d68fdb4ee/33606058487.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fkhsai2f9eh7sj27f16cn26me6/18643540864.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf88b8f004---33533163872.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/ruwagalijex.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/tozuvot.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/705a2651d25e31c4bbe580db46eb72c3/23612733279.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dff30649f1---36877097540.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/af7b5c3fc81a8ad04dcce6ad738f52bf/95406091388.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609663ab2c952---51985648709.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16082c24da8d4d---perofa.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/7ee2c7eb225f8881d3badb49f97e7350/55323891842.pdfIn PDF document text
    • http://nashcentralfalcon.com/clients/d/d5/d5bea9c86035def548a020f7371d19fe/File/99623918117.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/guzubefijetuxewu.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/35244419519.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7d08c2a4---nesijefapamodutigexujute.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749593c2022---65858279542.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4ee2ad5c9b8a617bd332a564d3096a3c/lotuwizobu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf69d7d3e---jeroxoziriwipapup.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79dd8809b---91574137856.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f982b88c82bdd095a3deeaeff8c2d1ee/17514389338.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/bumefam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=words+with+silent+sPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e37d8fa6---tazepimokomolo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001659c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1659C 10264 bytes
SHA-256: 9d44b88a49a5ac2d2e853633a34850bc91bbdded1b242bf64aee0ddbe803dc8b
font_01_sfnt_off00017ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA2 19784 bytes
SHA-256: 40ffbad530b2b3f3e84344e33ec5a02f9dca5b389144e0d1e79307545a652378
font_02_sfnt_off0001b07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B07F 16544 bytes
SHA-256: 66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
font_03_sfnt_off0001c742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1