Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba741c29fce8582…

MALICIOUS

PDF

70.5 KB Created: 2021-09-08 20:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a64914cbf6bfb54bbb5f9e202b6ef654 SHA-1: d4285beb1843656e90cd7fa1fe88a419369e6066 SHA-256: 8ba741c29fce8582aade42ed892a3ea2dc706df6c6858fe11088e6bd65f836be
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://euinsuti.ro/app/webroot/files/userfiles/files/komuxovetapekan.pdf
    • http://saipanbooking.com/FileData/ckfinder/files/20210907_EB24568F1F2B2E54.pdf
    • http://maezawa-jidousha.com/js/upload/files/11483605518.pdf
    • http://way-of-spirit.ru/upload/file/xigat.pdf
    • http://anticacarsulaeborzoi.eu/userfiles/files/zofonisokexegaje.pdf
    • http://jlsxjy.com/right/UploadFile/file///2021090715522373499.pdf
    • http://jongauger.com/ckfinder/userfiles/files/tatekobulasupa.pdf
    • http://www.lbtfilm.com/uploads/files/jalumagiwatirut.pdf
    • http://eperon-kochersberg.com/img_db/siduzipadasizaf.pdf
    • http://pol2-simf.ru/userfiles/file/turaxifufalejukumu.pdf
    • http://pro-group.ru/userfiles/file/67689089490.pdf
    • http://loscogliodifavignana.it/userfiles/files/bikukufalotaru.pdf
    • http://rcp-ranstadt.us/files/76520461150.pdf
    • http://0575zl.com/userfiles/file/9071669840.pdf
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1807964047.pdf
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/fosoweriripodofivazeni.pdf
    • http://cleversystems.ru/userfiles/file/xuzobefimiv.pdf
    • http://ilovehikari.com/uploads/files/11395977939.pdf
    • https://webaprint.be/img/file/68023153994.pdf
    • http://cbcom.eu/ressource/site-image/files/kalemisu.pdf
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/tukis.pdf
    • http://www.nagsa.es/ckfinder/userfiles/files/texanoxudawalewatadokokok.pdf
    • https://ozsersogutma.com/upload/files/ramuzej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=graphing+inequalities+quiz+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_off0000b3d2.bin
4a299e24240ca5279fb86e2eee679086b817d76d1af1f807ad27523b0271e09c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D2 11000 bytes
font_01_sfnt_off0000ccd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 16792 bytes
font_02_sfnt_off0000e4eb.bin
7e89d6e78419aa372d477484cc85f25c8ce9e34b5ba9eb2b502a598883275ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 15432 bytes

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