Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ef05f66c30ba5d…

MALICIOUS

PDF

89.1 KB Created: 2021-09-07 23:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 28d310e56ae1aa6c5a3cde2a7a85c56a SHA-1: 9a39ec43167fa4776510905115cfdbe1fbc9c00a SHA-256: f0ef05f66c30ba5d9e99dc5987e3239f8bb0872149eab454261cb3d3076c01cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=goetia+pdf+fran%C3%A7ais PDF link annotation
    • http://mextro.de/upload/files/wezujulatik.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/748s3c5crp7kgt3kebdbd6us04/41756075750.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/kidelewebegenitidon.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/namepepilepedop.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e30fb9ed619---73579928196.pdfIn PDF document text
    • http://pasted-radio.de/web/files/vadagi.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/161275c178f0c5---reriv.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/b3uvam4ufmc8q8nqbcr2h0p9p1/batajitokigotutewefapamav.pdfIn PDF document text
    • http://rapet.hu/files/82878609728.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/a59c3ceab02f40b292b64780224588e0/fuwoteridare.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/19433697932.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/72472578390.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716ca1cf626---xinukomaga.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/6255297140.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0b168c6edf7fdf954e2e3f252c555448/duwarawifamazu.pdfIn PDF document text
    • https://bonacorsi.it/file/97807467564.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/944e2ed8861259f97cb0835785e7983d/2487049388.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792495a8021---kebexebakozojuz.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/nenepixedosigi.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/2045879505.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///55381519485.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/32069507634.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/otfv0u5q9be96krv9fagttcbjl/nuxexamuxokoroguwejet.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_off0000d290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD290 23996 bytes
SHA-256: 7dbb3ea97829cba892f74b4507b034f33c952fb7b591856e6ea52e39c4c40f5f
font_01_sfnt_off00010eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 10680 bytes
SHA-256: 095402d1ccf6a3ed9dc28a0a0435ccf62dcc5e5e4bc75a71417e8773ca150e82
font_02_sfnt_off0001276a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276A 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_03_sfnt_off00013c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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