Malicious PDF — malware analysis report

Static analysis result for SHA-256 02714eb1a739d168…

MALICIOUS

PDF

81.4 KB Created: 2021-07-20 03:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c65a0184278f9a50c7167227f7c4e2f0 SHA-1: 7e00ddbf58ca274041ebebfacab58e7777b020ef SHA-256: 02714eb1a739d1684a628183fc724e2eac35d2b3a028c1fd7825c44c9c14452a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://highspiritsmusic.com/ckfinder/userfiles/files/kiwisifokevum.pdf
    • https://rijst.nu/userfiles/file/32411662919.pdf
    • https://yellowstonewildlife.com/lokujixolajujinasodiraloj.pdf
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/27547476921.pdf
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/48260783054.pdf
    • https://bhsbeacon.com/FCKeditor/file/67195116471.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a531c0367d5---sumowibabujufijudatizu.pdf
    • https://psfund.org/public/uploads/files/cms_files/paxopenogo.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/568f6131af3d1e077312fb689a031176/79186518638.pdf
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/furoguwuparazubupu.pdf
    • http://www.amedna.com/userfiles/files/76269239297.pdf
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/77658807646.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/1b6b2db41310295820bd60c750eb9ef6/61165171751.pdf
    • https://banderlogclub.ru/Files/file/20553605197.pdf
    • http://haithuanphat.com/uploads/files/48910912460.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/3lq2fvgs24b9h11kvga82vvsu6/72288379658.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16082920e6561e---tubaperakosa.pdf
    • http://ginzaoakland.com/uploads/files/93553284523.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f106ec3970---58065869594.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/u3avfn3ar7bsoc4120i27ujuj5/21155092416.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f19018badc3ff0d2e558220656a2538d/jelut.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bd7c4754f---fumaxetunemuvulaxepira.pdf
    • http://humanitool.ru/userfiles/file/87315248947.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1891a9e09e---50861939296.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a170850d73a---3342042030.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=congruent+chords+and+arcs+worksheet+answer+key
    • 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_off0000d725.bin
1b269aaa221390bc5b15adf9eb1bcbbe369122f12cd491aba26e1d0a477f1714
pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 10936 bytes
font_01_sfnt_off0000f065.bin
7ed9d130e97cbd271fc772eeabd9f172eec9c49a44a252415c9edddd065dbc05
pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 17284 bytes
font_02_sfnt_off00011df2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF2 16792 bytes