Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea2962461e19933…

MALICIOUS

PDF

69.7 KB Created: 2021-10-09 22:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ff2e9a349db41c0d701fd99f449d3e53 SHA-1: 9aff239c2587ff84427d0f86218f95e8bfc3f117 SHA-256: bea2962461e1993357711aef777463a9a9bd743f21ce63f9f79f977b08e01a9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://onlinepravenconsultant.com/uploads/wysiwyg/files/20889505020.pdf In PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1614416b83e83c---nadupowop.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/werilonijasasoti.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/zifazutatidadorojumob.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/57207639268.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/jiwavokinoxi.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210912140732.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/14615149126.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/f2f7d76208913f8b82c8c1372fc4a923/2021729691.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/kavejizazo.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/36020535419.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/kulejajurarixopixirupi.pdfIn PDF document text
    • http://7profi.net/userfiles/file/nedojitofarupupu.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090816573673499.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/75256269267.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/rufabikuj.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/90534468082.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/rifusizeviwuw.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613437469034f---deledo.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/11612199047.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/58048757313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=prefix+meaning+behindPDF 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_off0000b2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 10612 bytes
SHA-256: 7a15129c0eaeb67c469daef98ed1646169f3240a15c90bb3b80c4e8fc3322f0d
font_02_sfnt_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 15432 bytes
SHA-256: aa962d36c89bfc66dc130a9a1fd16677e54b5b5be0b73be3e172dca26c839a9e