Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe846e2e4b247b4…

MALICIOUS

PDF

78.3 KB Created: 2021-09-02 03:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3012eddae3c845852bb2d42925085d8d SHA-1: 70c5726894a2358ca21cd654e6a1429fdeaf5f8c SHA-256: 0fe846e2e4b247b49b2968e2c34d56f141fe14871cdc193594c18a5620119ec8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting domains. The primary attack pattern involves luring users to these external sites, which likely host phishing content or serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://escaletravel.com/userfiles/files/83581642858.pdf In PDF document text
    • http://wurbs-hanau.de/userfiles/file/97224858660.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/13931955535.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd041e19537---gasolir.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160748a8dcf7b5---37190985102.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/gorawuvapiberufu.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/b9uc415dsdk6lf12qrhuu5uh8i/87425947798.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/66983079812.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/mijomubanig.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/759e6d0f67ec8e5c75f34f270b6ed1bb/14435057050.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/set5a4im1hlbvfdsnsh3n6u3lm/98873645045.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/84b8cg4kp7jvbl3vl16j07es27/titugo.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/xozevot.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce02c613955---39178490200.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872f33aa965---milekedazifupimiwite.pdfIn PDF document text
    • https://ibextrail.com/editor-images/kabofatijozozikofos.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4hkm3u8aih5rblloutakvtuj67/nabidez.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc2439b4c---58548536947.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aa86260eb2---tozesasajiferixutokede.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e2c2cb51e---xikunagakav.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/21116081636.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/nanepesorudu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/96818ad38682d95e871fef7d14832602/78383410260.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/9742857410.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/arnosdi481cmuqhepbv5j14i7n/mapetabapepagokox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=family+feud+powerpoint+free+downloadPDF link annotation
    • 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_off0000c817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 10768 bytes
SHA-256: eaa3a962adbe76101fca671ba22d6e8e3f254ac7132d77fa5015123159820006
font_02_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 19788 bytes
SHA-256: 817e20a221de1fa13b4d83c80b66f303862ad6bc6b8942f1b7fd25af6a23a103

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