PDF malware analysis — malicious · 60955fad23a2213e

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 23:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b34e43759d12d7bd86eea055a3359505 SHA-1: 4538576714629948aaa7eb7e6b275407324367c6 SHA-256: 60955fad23a2213e344ade9c101db9144fbf41cd0f6876e60ad2013d453567d6

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple links pointing to compromised WordPress sites and disposable hosting. These links likely serve as a lure to download further malicious content, such as the PDF itself or other payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.7437

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 http://lakehighlandsrw.org/clients/863582/File/mufenaxabonepumodi.pdf In PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072959a62a2e---56220135995.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/0d639ee4eecbde72682511cdca165916/85614213949.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ed2220b32e4f11ccd2df51534af41a1f/zexowajoxekivijeful.pdfIn PDF document text
- http://zimaletto.com/uploads/file/pibezugoxodulokitape.pdfIn PDF document text
- http://booklandbooks.com/userfiles/file/66020489189.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078fb296bde6---69475319596.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/019a8589315462e9ff1a5f159ff8baeb/fofepefudi.pdfIn PDF document text
- https://kasihpaham.com/contents//files/45792525840.pdfIn PDF document text
- https://abcoegypt.com/userfiles/files/vuvasodonofumofifexux.pdfIn PDF document text
- https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3fiv03octdts8s7cd3jv08jfk0/70527588649.pdfIn PDF document text
- http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/juluza.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbd234319---moworoninel.pdfIn PDF document text
- http://alcantara.cz/data/file/95953076276.pdfIn PDF document text
- http://nail-free.com/ckfinder/userfiles/files/1755237539.pdfIn PDF document text
- http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/90297190096.pdfIn PDF document text
- https://jslt.site/js/ckfinder/userfiles/files/wefimagakezu.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead1001a97---monurowulewojekile.pdfIn PDF document text
- https://jackyrouxmethode.com/userfiles/file/gizidijupapijinudere.pdfIn PDF document text
- https://ooo-kenk.ru/userfiles/file/30878668705.pdfIn PDF document text
- http://eths1967.org/clients/6/6b/6b000f7c2bca5b3a89f93fde6b54c5e6/File/varujinoniwolezajuxegur.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/pamimizivixowojawudezutu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ecosport+2014+manualPDF 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_off0000d333.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD333	19720 bytes
SHA-256: `6687edfd6b66903084f5939a4ec56ff3228f6b8ea3d7e4a6696bfc2c1e734ea5`
`font_01_sfnt_off000106ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106EE	18256 bytes
SHA-256: `4f84e9bfe15a25ac6e11ef17bba3317f124873a4769a6cf5cb2bf9254b8aa2ea`
`font_02_sfnt_off0001236e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1236E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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