Malicious PDF — malware analysis report

Static analysis result for SHA-256 247026c1263937d5…

MALICIOUS

PDF

91.6 KB Created: 2021-07-07 23:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aea11ed3f395e377e4a6977908921baa SHA-1: a41bcf66c1b8d58bbcdd535bcfdfbe1ead550b96 SHA-256: 247026c1263937d5717dab56739e926b8b2fc6b6f7008bbee6cc0496c78d7357
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to external sites for further compromise or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861caabce19---pawufejarow.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3fe68eb7b---zabejejoporifafipuwivob.pdf
    • http://haisushitogo.com/uploads/files/45076675795.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bec4060c2c1---muvinikijakikexilexelinuz.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/u0a8p61s3lnchpvkfdg9ifi8u5/35666025161.pdf
    • https://sts-cct.com/app/webroot/userfiles/files/76285063034.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfe2f7a89d---mulivapofaxi.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/25119384769.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d750f98e42562f6aefa3c949e7d71470/vuvamonapebusiw.pdf
    • http://uci.ir/userfiles/file/90341041756.pdf
    • https://camgloberealtor.com/userfiles/file/98216666219.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/20f9c0109250799536a5ab186b17f72d/xuluxela.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5942b91d---88124008583.pdf
    • http://lagostena.it/userfiles/files/jagekemizutubiwuvu.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/gro0empnmdrfm4dbv1sbdck3lc/54674800617.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/6599b53b12dbd7511ac228f5491b62a4/vibagetukidaxolofumob.pdf
    • http://studiogiamberardino.it/userfiles/files/84663395999.pdf
    • https://poolpoint.be/uploads/file/tagikoledigureve.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ce41a10ab---fifanuzuluzavo.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210605025711144.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08a3531173---dubojeguxor.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0afc2f60---11532937545.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/69063d4141dc7a3e4c32620c821a49ac/kijuverekumovoja.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=be+happy+be+lucky
    • 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_off00010294.bin
0e9638969ff5864926d05ffe7e79007faaae0dd2d7e56b26912803aeb66c30ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10288 bytes
font_01_sfnt_off000119b0.bin
c82352407e50e385127f390815aea0523a9fb73bcd901c6c5c8b6e686cbecf8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 18168 bytes
font_02_sfnt_off00014832.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14832 16792 bytes