Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bcd1868e60a115…

MALICIOUS

PDF

119.1 KB Created: 2021-06-29 10:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 495698fcb92eae6ef07cb97b218d9352 SHA-1: 2088cecb812b9016a81fbc8c17256b9132cb04ff SHA-256: 00bcd1868e60a1154996a1eae4e2193e99ae910a6150b3e06cee3129dfc00381
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites utilizing the Formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

Heuristics 6

  • 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
  • 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 https://archism.ru/uplcv?utm_term=words+with+silent+letters+at+the+start PDF link annotation
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607847d0c1093---pudogoxagazupasipeza.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6b278dfe---povumakuvulugaladunela.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086b8ad97fa0---ruvese.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608987773627c---xixun.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad8416c91---58925217149.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/55b24321eea8291f5d342e7f63edcb71/65672010510.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ltobj30dbe34rrl89gok41vpi2/57734415616.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608118d2d1fc5---jupotivikoforag.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/69438854443.pdfIn PDF document text
    • http://doellefjelde-mussemarked.dk/images/newsmail/file/80980356340.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/pg4onbiilec3im5p6pf6iupqi5/27472367468.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/gis2jhpb8r26f429ki7kg7m8mo/videfupidukawoxonizipulil.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/02c51ffc8643606820c2a0f7c63958a7/kejomokozatasona.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/wiwunesosenima.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da27b4dec4---larakidavevibanofu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160700ed7b6b0d---39073052989.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/fesupow.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/79812466621.pdfIn PDF document text
    • https://termofriz.rs//files/wevufobukezosumupajara.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/kojawu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef4746051e---7980077085.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608596302d0bf---kuwej.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/38007093657.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/s3e4s28v2dphjih89934vh42p3/ruvebu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 10424 bytes
SHA-256: a67b878741fd1bb6ffe8066a121306ee3fac6c8719503fbd0163eb3b02ab724a
font_01_sfnt_off00014149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14149 21404 bytes
SHA-256: a58c5f4905002c9cb37b2efbbbc3d9874e8626af102c03b32b4e9afafb98bf3c
font_02_sfnt_off000167cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167CB 1996 bytes
SHA-256: a29b21d9ccd33a9e9325be5cbbe4cd0cd65e2669ff9f0ffbb56da9e398c8bc80
font_03_sfnt_off000170fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001890e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1890E 27608 bytes
SHA-256: c6db08cb5bcaa8d4b8ea1e0615e89383b92adc6145528078be317d9d529094ec

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