PDF malware analysis — malicious · 7effa24611d9d05d

MALICIOUS

PDF

80.4 KB Created: 2021-08-11 22:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: f42fb506ff4021185e4d5686451ddf1d SHA-1: ae18c2a27f9dc3d0b793821fb92c64e3a5cda13c SHA-256: 7effa24611d9d05dea7a24618868506a7a41e4b9964146532698c4dc004c7353

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting. This suggests the document is designed to redirect users to malicious content, potentially for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9438

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 http://tcihk.com/userfiles/42708325817.pdf In PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d99292ab1889e3c84cf6e70c490a488e/3934857717.pdfIn PDF document text
- https://o-dance.com/upload/files/sigekadaxufepifa.pdfIn PDF document text
- http://kap-group.com/ckfinder/userfiles/files/66995454601.pdfIn PDF document text
- http://sbstroy53.ru/img/files/wagifejubemikelixisi.pdfIn PDF document text
- http://aaykpn.com/uploads/editor/files/gelek.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ire4ja9p2k7hhptsibbbeo919f/gamanokimeralitopaxasuje.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2edcf276---97117923211.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f3ee00ce4d0f988d870b28f27e309c5c/4042247526.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b19663eb3a4---5423032098.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f367ff8564cbd4221ac08598d2143f2e/24502011741.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/b9bb6tqrakqmqlikeqt4vt3hr2/juvevot.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201cfe0751---75389025550.pdfIn PDF document text
- https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/hk3s8u5gls8fgvpvl31cvg3r16/30029490407.pdfIn PDF document text
- http://hodori247.com/uploads/files/78445969061.pdfIn PDF document text
- https://consurs.ro/ckfinder/userfiles/files/pupomapojatelapatovimiz.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160be824fe48e6---38756109205.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f76a8e3f---xijumil.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a556e75bda4---77230474992.pdfIn PDF document text
- https://migger.dk/userimages/file/wexesawufiwajomafina.pdfIn PDF document text
- https://mashura.co/userfiles/files/wamexudabase.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=adjective+phrase+definition+with+examplesPDF 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_off0000eb0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB0A	16312 bytes
SHA-256: `7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae`
`font_01_sfnt_off00010116.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10116	11252 bytes
SHA-256: `d92bbb0fc0e6964c469bff9c0bc273fc6add574ae17287864a4e9baa2a87f9c3`
`font_02_sfnt_off00011b54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B54	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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