PDF malware analysis — malicious · 29ae1b9449265447

MALICIOUS

PDF

67.8 KB Created: 2021-09-27 17:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: c4d3c47d6a8a04081bd923f77a2aa05f SHA-1: 699893770c99c59e2c9aecd268e5a229c988f3b8 SHA-256: 29ae1b94492654474786e174554e4a1ffc6bd98609c366d549f5487c7cbe6f48

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content from these compromised hosts.

Machine Learning

Nyx PDF Classifier malicious score 0.8439

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.
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
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://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e2500b68a---8973585650.pdf In PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420b5db7029---38512321909.pdfIn PDF document text
- http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mobewakumidinut.pdfIn PDF document text
- https://bankkartya.hu/js/ckfinder/userfiles/files/wodumunu.pdfIn PDF document text
- https://hmradiatoriai.lt/images/files/jumiloxalumivibexudi.pdfIn PDF document text
- https://qkon.ca/images/file/muxeloxitorumare.pdfIn PDF document text
- http://drcleancenter.com/uploads/files/202109252106204432.pdfIn PDF document text
- http://odontotecnicacoop.it/userfiles/file/refanaxijuri.pdfIn PDF document text
- http://xn--z92bzy85x.com/userData/board/file/84215210236.pdfIn PDF document text
- http://wideanglepackaging.com/ckfinder/userfiles/files/pikusen.pdfIn PDF document text
- http://aedjtjdshbf.pretty-match.com/upload/files/27646299001.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c462fb5c0e---89477892361.pdfIn PDF document text
- https://hohsingfiber.com/ufiles/files/94155773380.pdfIn PDF document text
- http://01host.ru/userfiles/files/90802506166.pdfIn PDF document text
- https://cobrawire.com/userfiles/files/dukikoguvifasidaxerajeren.pdfIn PDF document text
- http://fujiya-la.com/uploads/files/pezomavifevagetig.pdfIn PDF document text
- https://sofupingame.com/calisma2/files/uploads/musiwapawatimazegokajoja.pdfIn PDF document text
- http://naphotelbangkok.com/userfiles/files/20762302757.pdfIn PDF document text
- http://autobedrijvenindex.nl/images/uploads/puluwazuru.pdfIn PDF document text
- http://uptownfallschurch.com/uploads/files/tovoxutekokadelovoseg.pdfIn PDF document text
- https://ateliersmq.com/pevron/www/img/file/rimirulepozum.pdfIn PDF document text
- https://haciendaloscipreses.cl/upload/file/63667918613.pdfIn PDF document text
- http://hoya-system.com/uploads/files/202109230117484072.pdfIn PDF document text
- http://papaicountrylodge-longstay.com/user_img/files/pebekogolusexamosujodevaw.pdfIn PDF document text
- http://fese.in/ienupdimages/images/files/koxepekidevopivajenutav.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=rene+villacorta+el+androidePDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b1b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1B1	10308 bytes
SHA-256: `b0cc12952e99f035227b39cd84e64e9bcfdc169fb89669e66baa6647f31bdcff`
`font_01_sfnt_off0000c90f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC90F	18384 bytes
SHA-256: `70583a2de584f6e0701d9f5c506fe9a54fb9326766d186ed5efa6f47fad6a595`
`font_02_sfnt_off0000f78a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF78A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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