Malicious PDF — malware analysis report

Static analysis result for SHA-256 2242a162d054469e…

MALICIOUS

PDF

69.9 KB Created: 2021-10-03 13:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 866deb4d5cb34868b71789845bf8330d SHA-1: b8d50dbf152ef0da4808c9fa6245aa1dbb3aadd8 SHA-256: 2242a162d054469e922702ab06f01a37c53e8e6b824dbc1136db8961a314f1e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=stye+from+lash+extensions PDF link annotation
    • http://elitacasa.it/images/file/milapu.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/dopawitalo.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/bolinagem.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/bulolavar.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/rulewaxizokanajod.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/49029384384.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/60785338842.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xepunoxurabubabopo.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210912054819724490.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/zufekoror.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/jajuvexegovito.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/75831822947.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/sowinulo.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/zudome.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/83719243077.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/konipuwoneke.pdfIn PDF document text
    • https://polenhosting.com/calisma2/files/uploads/tibisowov.pdfIn PDF document text
    • https://campermagazine.tv/public/file/4961649779.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/69728790463.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/13956240278.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/84903539811.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/tewajavitaxelituleduxajam.pdfIn PDF document text
    • https://msiutilities.net/documents/tadajatuwodes.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390273758ce---24008633065.pdfIn PDF document text
    • 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_off0000af0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0A 10768 bytes
SHA-256: 29e6e0e7f07bafc623f71a1ebfe6b7983df22ca8210e023e8ba2df6d4fda0fcf
font_01_sfnt_off0000c7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AB 16944 bytes
SHA-256: e762002ea8af6d4d99a60743684abdcc5b93059fe86fbae4136acc4b287e4e2a
font_02_sfnt_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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