Malicious PDF — malware analysis report

Static analysis result for SHA-256 843ed4b9d0a5bc4e…

MALICIOUS

PDF

122.8 KB Created: 2021-05-03 04:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3122b01686c118b1f2f2ae6bdc6fd734 SHA-1: 588792bd108936345bc11897c830912f5c9b9e9c SHA-256: 843ed4b9d0a5bc4e1878a8f91c8fd12c4d3ae2967b81075c1f21cba7259dd2fe
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9583

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 https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/sqaaq03a70hrslor8h1ftsblp9/55388265450.pdf In PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/kh2ejpmvp79k4msapjh2hipib6/29669445993.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608948dd3b731---jifiku.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ddccb327c---jefegoxamugik.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/45592153031.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec8a23a8e9---magisidanemusitiz.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef6a5e54d8---64225819847.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/44a9a4f9d2e75e1c644dbd5000fb63a3/93188095216.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c2fe5c8af59142b55fca85bd0394f205/96848333027.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/old8anqdklsgke5opijc9a0arh/xeverepizeroxol.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb3b14022---58401693839.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a951c27287ae871bd12ba6b421bf0e40/nuwatezimowix.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084e42e33a8d---ridedejigonimesozoxuvi.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160793b10294f4---dutoxojelojususimuzilan.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4ce7002a---66623689353.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/18005602937.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/7c60dfcd679a89ece213ad65e0c6f54f/topixev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=baka+tsuki+sao+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000187f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F1 8392 bytes
SHA-256: 56d32f86aed3c268a4923b10593206c326d1929f3ecceae483f5ffe16b692f0e
font_01_sfnt_off0001a463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A463 5020 bytes
SHA-256: a719ab662924607a7a8a6ac5975c5dd0f61904b0e3b37e7cda4608b001a75340
font_02_sfnt_off0001b58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B58A 5836 bytes
SHA-256: fff154d78324303322d91947ceda80b216f92f300ab30b04d319dcd4cb14a612

Open this report in the interactive analyzer, or submit your own file for analysis.