Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaddd5a9af1274cf…

MALICIOUS

PDF

70.4 KB Created: 2021-09-18 18:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b02d21c17c3f02a7d8fb33c127ee7f7 SHA-1: 575b0ad21267bc4dab823710a6c6b5d01e0835d6 SHA-256: eaddd5a9af1274cfc4728cd979d088414dedc2dca05e15ed86ccac72d3fcaa17
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL distribution are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • 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
  • 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://mamitobe.ru/files/file/gimuroziri.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/sawam.pdf
    • http://medizator.ru/ckfinder/userfiles/files/fawozi.pdf
    • https://odlingfamily.com/userfiles/file/didelanosijefazanelojobi.pdf
    • http://moveworldtogether.com/datas/files/55365514408.pdf
    • https://unaizahic.com/Files/files/53358993950.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ttselkbq8dunesafc0n7iotdq0/pakodo.pdf
    • http://huarui-bio.com/upload/files/sokutotuweguzaselapiro.pdf
    • http://ellenia3.eu/userfiles/files/2343971756.pdf
    • https://mancomunidadvaldizarbe.com/userfiles/files/golob.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16131da2ba2f31---fakogixisugoroxi.pdf
    • https://whatshoulditcostme.com/userfiles/file/64817874395.pdf
    • https://malmospelmanslag.se/userfiles/file/47330418125.pdf
    • http://inarchengineering.it/userfiles/files/82253811345.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a3f8c1b8e14c05c31bff08972d23f9c6/wefokudiwugidebadula.pdf
    • http://etre-belle.su/images/file/bifugodusigolezepovo.pdf
    • http://whipitleather.com/userfiles/file/nawukevewotodanuvawa.pdf
    • http://autobedrijvenindex.nl/images/uploads/fudumemurilirekolijimebim.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/43653588973.pdf
    • http://bkm-market.net/userfiles/file/98496906687.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416a7d9dd22---64445512843.pdf
    • https://fsreloading.com/userfiles/files/84174543953.pdf
    • https://toocapen.com/files/67287079680.pdf
    • https://ietc-oman.saktoon.com/userfiles/files/62960021432.pdf
    • https://sanaspinler.com/calisma2/files/uploads/gujosoxafemedaju.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/87498810602.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ae232849c56c9b9202fc8b7921b63fe3/dikupulesedewedek.pdf
    • http://3dprofi.net/images/uploads/file/59302977119.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=my+town+pets+game
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b689.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB689 16792 bytes
font_01_sfnt_off0000cea0.bin
148b83adeed778550387781894efe807660948d81673eb49777384ab24812cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA0 10552 bytes
font_02_sfnt_off0000e6ca.bin
8bf494c56664403ec3511da28feafd9db5a7c36782087ef578fdd9c1d71cff58
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 14784 bytes