Malicious PDF — malware analysis report

Static analysis result for SHA-256 8280307cd2f97201…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 02:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7509a1dc6adce90c4dc223d5fe543ffb SHA-1: a0d13e7f41830ab7716948ed809f5c699a2cbaae SHA-256: 8280307cd2f97201aa229d9c058a0ea257b850ac2ec29ed44c7d4f8f7ba2fc8d
146 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It impersonates a cloud document lure, indicating a phishing or malware delivery attempt. The embedded URLs point to various PDF files hosted on potentially disposable domains, suggesting a link farm used to distribute the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://steakclubhn.com/campannas/file/86897540449.pdf
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/46646155256.pdf
    • http://safaraval.com/basefile/safaravalcom/files/74388649267.pdf
    • https://washlounge.in/ckfinder/userfiles/files/gofesesinujuduxipapam.pdf
    • https://szabobuszrendeles.hu/files/files/47533446049.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/16c3ac1db312b0b2411a97c35c0bdbd2/nokeva.pdf
    • http://ottuk-e.org/userData/board/file/judebironiku.pdf
    • https://www.weboonline.com/ckfinder/userfiles/files/xokerudenizojikefidusegu.pdf
    • https://noursportevents.com/wheelmarine/userfiles/file/rosebilebox.pdf
    • http://ingfrimale.com/userfiles/files/6331138077.pdf
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/23215499226.pdf
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/zovizobol.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/7456031293.pdf
    • http://devison-matras.com/upload/file/79323210437.pdf
    • http://akcompany.vn/uploads/userfiles/file/53456880326.pdf
    • https://qpshouse.com/upload/image/file/dizimiwego.pdf
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/86132717732.pdf
    • http://niezapominajkowo.eu/userfiles/file/33592552147.pdf
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/45644001783.pdf
    • http://studioriggio.it/userfiles/files/nupinalojomiborotoj.pdf
    • http://roomyab.ir/basefile/roomyabir/files/wokopaxo.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/87132509780.pdf
    • http://hophungvietnam.com/app/webroot/uploads/files/bawilowuwutudatawoliwoj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+transfer+files+from+android+to+pc+without+usb
    • 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_off0000e1bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 16792 bytes
font_01_sfnt_off0000f9d3.bin
2f381a231f29ad14e8a4d48491e32bd130d0b34c85e4b48a3b67af515b6ace9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D3 11200 bytes
font_02_sfnt_off0001139b.bin
696d59155c367aa0dddf422483bd5307a53670695a67af9fc477a87f678a8e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 17792 bytes

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