Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1529dcb852ed2a…

MALICIOUS

PDF

69.4 KB Created: 2021-10-01 19:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 67ee7726dfc12f6712055891cdde9c92 SHA-1: 695b412fd94058742455f78e799f6115c234f2e7 SHA-256: bb1529dcb852ed2af0f972349691c440be62dca19066b9a2ec4699a47d1bbf07
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-based design and embedded links to external sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it's designed to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152331c02cfe---95099998169.pdf In PDF document text
    • http://pokemom2.com/uploads/files/60153311060.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/lolutojeneforari.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/kerivurakutasetegejanap.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rf1vg87t7msoc59ai44ki3am0i/16706571870.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/91842126427.pdfIn PDF document text
    • http://ontozescentrum.hu/tmp/1578074191.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/vofedumufodokidujeba.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/masuk.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/10724183683.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/noxanuw.pdfIn PDF document text
    • http://packturf.fr/files/53498134960.pdfIn PDF document text
    • http://attlas.center/userfiles/file/dapufitonukuzibomur.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/wojosela.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/bavoporirexobejo.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/febotaf.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/50909444342.pdfIn PDF document text
    • http://mlead.net/images/e/file/79540029920.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310196a79f4---88363154450.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/powumokakepuximo.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/65434163261.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/gulugoza.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/gavika.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109071808591833.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=momin+ka+hathyar+in+english+appPDF 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_off0000b119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB119 14400 bytes
SHA-256: fcbe578fab34d2d2456e433871b7cf04e525fe073fabd78338b95801069d248e
font_01_sfnt_off0000d4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 10900 bytes
SHA-256: b93c4c35766024df16c599a7b87e8f306580149ba4709ac72343daf664d272c7