Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47fdf92b5886ae0…

MALICIOUS

PDF

76.7 KB Created: 2021-09-14 02:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ee44ff5aacea90c3449529f6f86f30fb SHA-1: 7f940f2e4b5af272eb66e7a36b1c39b0070965d6 SHA-256: f47fdf92b5886ae02003cf3781b4c015cbcda218ca8376da70ecd79e442868d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to redirect users. The presence of these links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://irlanc.ru/uplcv?utm_term=bios+neogeo+zip+android PDF link annotation
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a5a84ca773805d1209ebbdce52926a6e/11403143302.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/58946080544.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/bivetaluwemujosedovuf.pdfIn PDF document text
    • http://kmsenior.org/file/files/wedimi.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/67325363370.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/59794152357.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/rowekiwugapivududo.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/jezalafim.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/9029209263.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/30023809851.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/83155797143.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/86068391921.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/vopidisivave.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/tisafuwaf.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/62378573240.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/peparevufixa.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/vufiguwutomojug.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd826cc75c---64464830096.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/tamediripimemitano.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/wunudisifub.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/nefewazasudu.pdfIn PDF document text
    • https://mkontroll.hu/File/kuluwodegojujes.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/30530706068.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/wikudu.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210902101840_f3kgac.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_off0000c6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 17708 bytes
SHA-256: 4a513019bb70af6b54b16083d9d6e5eb42054804a7d4972d152d1da5b032c443
font_01_sfnt_off0000f4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 10536 bytes
SHA-256: aeafee64872177d9af0177519809dbbccff2571a6e541e26ef9eb3199a0435a0

Open this report in the interactive analyzer, or submit your own file for analysis.