Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6d25682d23229e…

MALICIOUS

PDF

88.1 KB Created: 2021-07-08 19:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1126d1eef3d959cd6be137487e983036 SHA-1: 443b99fbfe4d1c225e025a22d11648fbbff2d3e2 SHA-256: ae6d25682d23229ef5f4ce2036fa6884a77efce0f346a7d5c5adadf9bdb35720
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the nature of the links and the heuristic findings point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=wolf+of+wall+street+movie+for+free PDF link annotation
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/94aa93e9693dd5a662a7d59a239429c7/lifulobipafajulo.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/e5a6f8d2442f1d7ac2e4ffbe9f1bb290/77431208779.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/28180396489.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8k6gefri65meef29lmkp0r3c6o/76886056095.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/fonorepukazipofakipo.pdfIn PDF document text
    • https://campermagazine.tv/public/file/gofabixum.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16071958e30da7---81449071230.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/damej.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/12884944095.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/sesiwiva.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e1da5d06e---70173588186.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/mobolodesewetonenok.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/uq5q7q8j5q8d7gopif7u3j21n5/6433764050.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ndbuhde7ftb8gb07406ebfo5jb/39623330174.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/vebaxegajotepenemeri.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/mixap.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/qcgc5a3gldif7fosh6j4dkhpb8/93907653053.pdfIn PDF document text
    • http://pronobile.de/catalog/file/67550527068.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/saxapebafikodiferemedu.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/83920306151.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/kd1kjeco6h0q8c6nn9b5hk800l/1118923001.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5834b000c9de9c460adcde34c0e0bdcd/51161744509.pdfIn PDF document text
    • http://blueyee.com/upload/file/16064210473.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081131fb2115---75792860533.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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 10416 bytes
SHA-256: 4b40780c2d3c6e78ec7adc8c2d853a12b831ba01388a1d1e5e3c029b7f82102c
font_01_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12353 18544 bytes
SHA-256: aac65ab349e3d59cd6828e6ce30204bc508e24f01bed0af7cd87d8da61df8f48

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