Malicious PDF — malware analysis report

Static analysis result for SHA-256 160c6b379f0429ff…

MALICIOUS

PDF

70.6 KB Created: 2021-09-20 18:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a11bf37f109f6dbb37cae682cec7e2b3 SHA-1: 754cd59d391730512f1f34b0b84d61792fb5eb6f SHA-256: 160c6b379f0429fff932e8801454ab268b142df6ccbfa51f776d9d4891d86465
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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, suggesting an attempt to obscure malicious destinations. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pickup-ws.com/userfiles/files/33246207800.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133114726ff1---66155576153.pdf
    • http://abwrichmond.com/uploads/files/japofulubakelododasi.pdf
    • http://euroteam.vn/ckfinder/userfiles/files/javefomesunulog.pdf
    • https://allegypttours.net/userfiles/files/numuvudefisenezafawepi.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/nosoresenevekofunej.pdf
    • https://portalkucharski.pl/app/webroot/media/files/bijebizava.pdf
    • http://www.polni.si/Images/files/tekutu.pdf
    • http://metabolit-plus.ru/files/file/60170530989.pdf
    • http://lovepetclinics.com/file_media/file_image/file/mexiko.pdf
    • http://graciaindoutama.com/kingkong/userfiles/files/99888854978.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/96885188364.pdf
    • http://veterky.ru/ckfinder/userfiles/files/xufezatalunabu.pdf
    • https://daynexweb.com/upload/ckfinder/files/56075840006.pdf
    • http://lianbang123.com/uploads/files/202109091121296862.pdf
    • http://cafegreenwichvillage.com/uploads/files/80058756524.pdf
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/42081765497.pdf
    • http://urotunisia.com/uploads/FCK_files/file/7026832240.pdf
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/45134341126.pdf
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/15234182297.pdf
    • https://dellrein.ru/content/file/vuxowagikoso.pdf
    • http://modamoda.nl/uploads/pic_lib/file/64216765855.pdf
    • http://arredamenticucinesiciliane.it/userfiles/files/xewivogimupejisega.pdf
    • http://protectakoteasia.com/ckfinder/userfiles/files/ruriporexaxexukixotonuxet.pdf
    • http://aucontecnologia.com/userfiles/files/10046184809.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=game+booster+free+fire+gfx
    • 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_off0000b2b3.bin
c34ff8366d9c008b4f0e3856856015369cf751f57245bfa9437ab5218834dca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B3 10688 bytes
font_01_sfnt_off0000cb53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB53 16792 bytes
font_02_sfnt_off0000e365.bin
9fd258eb16c25345a60ee85d8ccab974eb266bb6ceef7586481b12d974271f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 16244 bytes

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