Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2aae17b18c121e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 14:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8c4cb923c1eb7901e1e3990d73e9e309 SHA-1: 86216948d7b8c21159e9f80f6689957f6fec3fba SHA-256: fc2aae17b18c121e898e0535b368f6421c3a484e048f1c29b534b9021fea83aa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of links, many pointing to compromised websites or disposable hosting, indicative of a link farm designed for SEO manipulation or phishing. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's purpose is to trick users into changing payment details. While no scripts were extracted, the extensive use of external links and the nature of the heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://fullx.net/files/nosavutejiteletitetujo.pdf In PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/nk3r08juifsj3gfd9uj6a7frup/voxawakamenetaxadepu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ffa588bb---nejufowenawifikavatopapil.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/bejejukanenakilumed.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b30280bcce7c8c937e9006fe90f34b4a/nabin.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/91731548577.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/gadokiliben.pdfIn PDF document text
    • http://aplus.to/userfiles/file/33755369531.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/vamuwidolu.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/45043696914.pdfIn PDF document text
    • http://sciattella.net/images/file/woletiwipimuwi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/866f89e1e210377bbfae02c91d922d90/20742232972.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a91d66888fe---38990446291.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/a47903fa7862d8e6b9af7a9951ec3da4/27883070020.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2225427ef1---duxabudidesixuwu.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/perijifawebinowikisefira.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/8f1345ef4831bf0c776863d47aedc934/17813433021.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/66349023485.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0e34d28437c5a86363802e62903792e5/35009847513.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/96756178698.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/d655v8ugnt7691bsqdgrb7261d/denisuvasodapebufigena.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e16db151217---76970952960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=marathi+typing+lessons+pdf+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_off0000dded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 20564 bytes
SHA-256: 48f89b97f62bb1764360e73c09f29a78154ea7796bd680ef44f89e37f7cdf070
font_01_sfnt_off0001149e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB5 10968 bytes
SHA-256: bef5dccc44cda72f69c22a3d90e69a802f2fccc0232311bd69fdcd88ec7ae4c5

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