Malicious PDF — malware analysis report

Static analysis result for SHA-256 29067e5da65f5e75…

MALICIOUS

PDF

82.2 KB Created: 2021-09-20 00:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b2771e5f89b71e5a58378e5faf09e6c3 SHA-1: cdb602ed9efb8f417d7e623036bfb268c36911f6 SHA-256: 29067e5da65f5e7560c2788cce69b828d83917d02eabed6ce82cdd68d6aaf4c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high number of embedded links pointing to various domains, many of which appear to be disposable or used for hosting files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users to potentially harmful content. While no scripts were directly extracted, the structure and numerous external URIs indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=triathlon+training+app+android PDF link annotation
    • http://vxclouds.com/userfiles/file/76629764285.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/rifiwuruxanom.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/39830107662.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/43955850219.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/vadagemu.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/65172668605.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/tafidoxexinara.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/midamijajarejidijiwewegug.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161431a8c055c8---vixisudisitudavojip.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/64n53vbpm4gucp51n2hlabp4d9/46174953681.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/75747260560.pdfIn PDF document text
    • http://sushi-belovo.ru/files/24737755052.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/65378154316.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/17562733043.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/zesepoxisiwivaso.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/74338649230.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/tonumitezoba.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/31854386960.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/lujan.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/87420511879.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/babemajuxusowem.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/84092382823.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/83667963727.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_off0000dcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBA 18292 bytes
SHA-256: 44bf0a8a65c45899655d668ae983432c8ff405ba5214c0ee1a2c217f48c21389
font_01_sfnt_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 10336 bytes
SHA-256: 1af706f8b5383fb95fbc96c76e9a7b01e5f3cb783190d8f633bbac22ded4f39c

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