PDF malware analysis — malicious · 6bdbba97480caa04

MALICIOUS

PDF

80.4 KB Created: 2021-09-19 01:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 746132ae77b5c74e28de9bb033843a75 SHA-1: 27af70b150910d744771c5ae209720ffca6674a6 SHA-256: 6bdbba97480caa04f131169d779fd9ed29d7160cc44ecb59bc2791b80810b60c

64 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to compromised websites, indicating a link farm or redirection scheme. The heuristics suggest the document is designed to leverage compromised CMS uploads and disposable hosting for its links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

Nyx PDF Classifier suspicious score 0.3524

Heuristics 4

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
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://inwebjor.ru/uplcv?utm_term=can+you+know+who+sees+your+instagram PDF link annotation
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613361f5a468e---fisefufonifipos.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/90crlp960raucbsrflgpihe20h/79634936352.pdfIn PDF document text
- http://jianianhuayule.a9188.com/upload_files/art_files/files/20210910_041243.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139df1c70810---43845947462.pdfIn PDF document text
- http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/73630129147.pdfIn PDF document text
- http://mosme.org/uploadfile/files/5716765752.pdfIn PDF document text
- https://locktactyuma.com/ckfinder/userfiles/files/bulilelafot.pdfIn PDF document text
- http://tochalco.com/uploads/files/nedekoletopemevinime.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/xubebapoginixaxate.pdfIn PDF document text
- http://www.biosafety.biz/ckfinder/userfiles/files/xanurigexakaruga.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6k74u6fp94l5rsedsjg7ck2blb/tuvasala.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b85f569bd2---senufizivilokaxitosupe.pdfIn PDF document text
- http://opusincertum.it/userfiles/files/zorosakorofezumojisat.pdfIn PDF document text
- http://rebeccafantarchitetto.it/userfiles/files/98891284043.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340846e676e---16758947627.pdfIn PDF document text
- http://btsoft.vn/uploads/files/wiwonatasimak.pdfIn PDF document text
- http://hmed.vn/upload/files/segofivakuxenopakolimowe.pdfIn PDF document text
- http://centonze-vini.com/userfiles/files/63071193295.pdfIn PDF document text
- https://alasclub.gr/neuro/ckfinder/userfiles/files/bujapakog.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ifn9cnb7q6kfoa835qujue3mj3/jusifaruri.pdfIn PDF document text
- http://testpensija.bankai.lv/ckfinder/userfiles/files/jezovesitukonil.pdfIn PDF document text
- http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/42290831525.pdfIn PDF document text
- http://zonweringbelgie.nl/ckfinder/userfiles/files/mananobijunoxiweneni.pdfIn PDF document text
- http://abbeytraining.net/userfiles/file/6830457735.pdfIn PDF document text
- http://budaikepkeret.hu/uploads/file/lotiborolal.pdfIn PDF document text
- http://tvoirostov.ru/ckfinder/userfiles/files/vasawumafigokenami.pdfIn PDF document text
- 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_off0000e535.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE535	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD47	17752 bytes
SHA-256: `6f16b79a030ee9548991189d99c7a9cbc9a588f778efabd4de10c917ba8f61cf`
`font_02_sfnt_off00012abe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ABE	10932 bytes
SHA-256: `9cf25cf69757bae6aae304807626de6d06c53f3972ce710d60ef61aa56132937`

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