Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03e96c9b73fe8dd…

MALICIOUS

PDF

86.7 KB Created: 2021-08-10 06:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1da008b39460956e4717a0192df8fb28 SHA-1: b777a89fbdbf9266acccca40e596900adbb6f1c3 SHA-256: f03e96c9b73fe8dd01625137393d2627425f1347d9c9996585d86e8c127161d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=startup+business+plan+sample+pdf+india PDF link annotation
    • http://a-aqua.fr/ressource/site-image/files/75929422766.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/31214996692.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f6caf35cf---zixawufadinomili.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/840495421.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d111eb0cac---gubenatejug.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210630_103114.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/85281158937.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1ad77383ab3037748335c975a1e9c30/53098949644.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4270eec1bc---23013289981.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/kukibitenomisako.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/84413552587.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/84076334966.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609070fe63045---zawevutoweta.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/fs1uip1a1649mk2behv4kl5l61/vukixanukosa.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607600876d143---pivadimifovi.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b61687600---99039182274.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/nizof.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc4257255---loxovuruz.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/82335496745.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4246e616cad07a3c039136ff11da21c0/tikudupubowozuxi.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/xewisa.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/tizeve.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/zojalafuleminiluriketopi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF49 10852 bytes
SHA-256: 645e3a4627336747660468d2eaec25f1ef0b49f783dcb35704b1a0a5ce1d8233
font_01_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 16604 bytes
SHA-256: e31ccc1abe461941113f59eac979ff89e2a4f70c0223cca96eb7299f950dc97c
font_02_sfnt_off0001331a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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