Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32c1b32ae2750da…

MALICIOUS

PDF

72.2 KB Created: 2021-09-30 12:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c61c36ae99a13e15c5d8eaeb141ca6db SHA-1: 0646002ae0cd3ed836454f60912682a96f47d1d7 SHA-256: a32c1b32ae2750dad08581c35cca3e5b2fddd3ebbd591312525da11722e8a0c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, suggesting a link farm designed to trick users into downloading malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. While no scripts were directly extracted, the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 https://onlinendttraining.com/files/gegogogidubelorifip.pdf
    • http://alajwakh.com/uploaded_files/userfiles/files/rajusubek.pdf
    • https://seas2010.cienciaevida.pt/site/upload/file/jikutosubibawixufuvesug.pdf
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/92190512145.pdf
    • http://effektfilm.de/files/file/48616347299.pdf
    • http://xiangzhuan.tw/upload/files/31244589336.pdf
    • https://almuhja.com/ckfinder/userfiles/files/63037962205.pdf
    • http://pastoret.it/userfiles/files/42242352925.pdf
    • http://dd-eng.com/files/files/ruzurumetu.pdf
    • http://mextro.de/upload/files/39753240385.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6ae76736b---sesipezakubabowijoxefimo.pdf
    • http://dezis.ru/uploads/files/78320993703.pdf
    • http://capitolmetrophysicaltherapy.com/files/files/fopadisagivuw.pdf
    • https://adamslakeband.org/userfiles/file/57053765531.pdf
    • https://kotata-zlin.cz/obr/clanky/file/25789238435.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/dea027ee4a0f197fb66bd030a7bd58d5/remakowakalevesomuwuvakew.pdf
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/jajulixujebuw.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1614e27cf2b542---zutabemuminaj.pdf
    • https://afritransport.com/app/webroot/files/file/3400519012.pdf
    • http://i-akparat.kz/ckfinder/userfiles/files/18927257718.pdf
    • https://allegypttours.net/userfiles/files/88644146389.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/99366845592.pdf
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/63805787933.pdf
    • https://flomogroup.com/upload/files/renetufaremolaf.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/salebupufiwewufigogewa.pdf
    • https://congnghieptauthuyvietnam.vn/upload/files/42889641351.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=apk+downloader+for+android
    • 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_off0000b6c8.bin
a02be8dbc05714d6ad144843fcd7e83a138da622e366e3b274f66767edc52f67
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C8 17204 bytes
font_01_sfnt_off0000e316.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 16792 bytes
font_02_sfnt_off0000fb2d.bin
3d8207913cd3c9e739a3a508844df0a7b91b1dabc0ac9f2767b1ad120d98383f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 10384 bytes