Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be588a61bdd5bfa…

MALICIOUS

PDF

65.1 KB Created: 2021-09-30 17:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 78fce9d5f9ac26188c6b606e9cbcc5dc SHA-1: c5de7223735e899cf2f8d843becc1966ca90c672 SHA-256: 0be588a61bdd5bfa23caa5f2ce64f0e56fd1503641a409092382ce5ee29e75c1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting. Several URLs contain UTM parameters, suggesting a phishing or spam campaign. The document's structure and the presence of multiple external links strongly indicate an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4432

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
  • 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
  • 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://inwebjor.ru/uplcv?utm_term=ghd+tv+sports+live PDF link annotation
    • http://www.clc-engineering.com/siteuploads/editorimg/file/bemepilif.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/gomikunezebokuga.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/kidifot.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16154218b322a8---digakafuvapusoxiw.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/16555763708.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210927_AB4CC118635C5129.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147dc5e600e2---mawojekekokin.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/rilajemix.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091200465512.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7b174ca7---7773011123.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/gefujile.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/rikop.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tfaihb1hsrr062fgtd2m7r82a7/pimemabemi.pdfIn PDF document text
    • https://fjhi.org/userfiles/file/92100368415.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614165b87b106---63967056692.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/lajunobalokobewawov.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/54643003663.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021918_18333_168.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed94486db6---64346986856.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109071935193585.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/xowonilixaripofu.pdfIn PDF document text
    • https://medius.sk/userfiles/file/41890911756.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/51260824555.pdfIn 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_off0000b1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BD 10328 bytes
SHA-256: 31e906501ca9fd69f247969ac9a863abfd076696b94b53084be828bd7054844f
font_01_sfnt_off0000c927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC927 14736 bytes
SHA-256: 09003dcd00b52931fefdf4186a8f0aba820fe92657d666ae3fd145f34a8e2d87
font_02_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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