Malicious PDF — malware analysis report

Static analysis result for SHA-256 b063b2e14f90114b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 19:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11b33ccd1e22b5a96d0bb5290f651b8a SHA-1: 3b5cf0069218d4233a7623bdcd00cce4536fed7f SHA-256: b063b2e14f90114b639d838f2b10e73bb139f8fd14901e2b635ad7d3172d9877
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://andlupa.com/userfiles/file/lazaroje.pdf In PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/65975697330.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/rolesakejetonusutefi.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/tabojusoduranenokab.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/padagataliwed.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/23808824796.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/489668655.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109020938079958.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/81421340787.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-04/images/files/67743349274.pdfIn PDF document text
    • http://7profi.net/userfiles/file/22279136173.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/ralurogiwasavize.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/29794034926.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/16951378008.pdfIn PDF document text
    • https://fototipia.hu/files/files/67056471264.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310024a52c9---76603326248.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613488069f983---12845364079.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/pagizulatakiwofetoli.pdfIn PDF document text
    • https://thepainter.asia/upload/files/xebigamaxaniwulubam.pdfIn PDF document text
    • http://sun-eko.eu/files/file/28337012902.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/72839938336.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/59563269428.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/luvelutujalusipivigupamub.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/fagelujesemabedevedexub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=manu+dharmam+tamil+book+pdf+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_off0000d778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD778 21368 bytes
SHA-256: 5ec0f966d0834764cb63a22f4d2a29cf59390f3edce1c765fa92aec327a14293
font_01_sfnt_off00010e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 11008 bytes
SHA-256: 6ffb90b2d7105a8d16f8af747ef73e350ef3c7a6446fee8aefeefee87fe9faa5
font_02_sfnt_off00012777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1