Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d8736b339cef9d…

MALICIOUS

PDF

71.6 KB Created: 2021-09-19 00:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a66397e7a389539d0ad478e7424d5438 SHA-1: eae6f3698441646dad0820f7b255ac26cbb4a1ff SHA-256: 09d8736b339cef9d11ff0a95c5a2a5462a05b83b7db3fd2b9f1838c444e094f6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm, likely to host phishing content or distribute further malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://townofwinslowin.com/flash/townofwinslowin.com/file/tufulonizekupo.pdf
    • http://marcobernini.it/userfiles/files/53330244558.pdf
    • https://cissud.eu/uploads/ck_editor/files/46698049039.pdf
    • https://mumegram.com/userfiles/file/71194766852.pdf
    • http://angel-conference.org/upload_fck/file/2021-9-16/20210916130034868475.pdf
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/bujib.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/53335425916.pdf
    • https://netron.pt/app/webroot/media/files/60255694814.pdf
    • http://flemingdecal.com/uploads/assets/file/mefan.pdf
    • https://primer-spb.ru/files/files/90262933463.pdf
    • http://www.huntsvillepr.com/files/files/13877404168.pdf
    • http://madinagirls.com/easydo%20v2.00/files/uploads/50812005216.pdf
    • http://brunagabriele.it/userfiles/files/vegozuju.pdf
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/puxelixu.pdf
    • http://digifast.cz/userfiles/76343119622.pdf
    • http://educaholistica.com/resources/img/imagesck/files/filawumivetum.pdf
    • http://studioarchperissinotto.eu/userfiles/files/79996541920.pdf
    • https://radmangroup-ye.com/rgfiles/file/josupenefiguzifasev.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302e609c3d0---75284806819.pdf
    • http://guidesdugrandlarge.fr/images/import/file/96731786116.pdf
    • https://faktxeber.ru/resimler/files/wobamiki.pdf
    • http://cybernet-ap.com/UserFiles/File/94181237003.pdf
    • https://jatransfer.com/userfiles/file/58664062083.pdf
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/66431992728.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b33931b3b36ff94ab3485dc4798263c6/towelij.pdf
    • http://qlinairnv.be/userfiles/file/71661674994.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=scott+mccloud+pdf
    • 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_off0000b7cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CB 16792 bytes
font_01_sfnt_off0000cfe2.bin
7923fc99ba77fa687b8a21cdc59c0ee64e13e64bb6eef2a317f123bd390ed864		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 10200 bytes
font_02_sfnt_off0000e6c3.bin
fd1d62505805ed4094ab8f34b22cd0a461b90d067d545081cd747c1afa9cf331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 16444 bytes

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