Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c02d5a8942d21b…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 15:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 66ee1bbf32813df750f0cefc406027dd SHA-1: a4e3516fe4d5f54cdb12f1757ca698a9fd7b1058 SHA-256: e1c02d5a8942d21b8f093b284b38edb2decec1b98adc45307974c80b0c97057c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ClamAV detection and ML classifier strongly indicate malicious intent. The document's structure and the presence of multiple links to potentially compromised CMS upload directories suggest it is designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.igescanada.com/ckfinder/userfiles/files/fevawojujigek.pdf In PDF document text
    • http://cpviettin.com/upload/files/21808611804.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210907_034744.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435bfb4fd8c---67027705530.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/23006446483.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/51942114633.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/80b8964d45741323acd2fcc15c66f7da/dekowega.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/9lhqkk06q2qr7a8tptred86r04/35422469090.pdfIn PDF document text
    • https://langumeistras.lt/i/File/47679600817.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/24718616546.pdfIn PDF document text
    • http://yjbiotech.cn/upload/files/jurezakosegaxagu.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/71347357594.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613380c4d063c---fefazovuwalejasokekafagi.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/79361906125.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/tewivekiwopuvuvewu.pdfIn PDF document text
    • http://rem-proekt.com/f/file/79105390627.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/mojajitusanetijegubane.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/fubusarozugogep.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/xuwemaduxudesuj.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/zobabejukonetifi.pdfIn PDF document text
    • http://dejede.com/userfiles/file/jinaxamelat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=3d+motion+wallpaper+for+androidPDF 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_off0000ab94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A6 14720 bytes
SHA-256: b898d1ab781ffd6290239dc5d2d7d8b96226f7da4a807d052088975f1f253c59
font_02_sfnt_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 10652 bytes
SHA-256: 33925d123a9e5994be357e21eb1a0355ee7a0a5bcc7bb4bb3e84bdd44b93a626

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