PDF malware analysis — malicious · 644ae99e5923aab3

MALICIOUS

PDF

80.4 KB Created: 2021-09-20 12:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 3b66448a1194a29ea83363ce96a0ee69 SHA-1: 03ce303e259d17f2f010adcaafac3ebe6bfd4821 SHA-256: 644ae99e5923aab37a05b147655a97aba5f68cd49a50250c71740ac0692e82ba

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.6000

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/llqk4mtvn2f2sgr4j7lk444ln5/87924161853.pdf In PDF document text
- https://cartolmania.it/file/pujedutenolubofakox.pdfIn PDF document text
- http://novafish.it/userfiles/files/55367096161.pdfIn PDF document text
- http://administratieindex.nl/images/uploads/96622973128.pdfIn PDF document text
- https://hometutorsdelhi.com/userfiles/files/sopuvupatim.pdfIn PDF document text
- http://dentalclinicbangalore.com/uploads/26240398590.pdfIn PDF document text
- http://fge-service.com/userfiles/file/52020192218.pdfIn PDF document text
- https://typeone.com.my/ckfinder/userfiles/files/kadile.pdfIn PDF document text
- https://tidurmalam.com/contents/files/98463126098.pdfIn PDF document text
- http://nhatrangpalace.vn/app/webroot/upload/files/xapabozigurus.pdfIn PDF document text
- http://mygotour.com/FileData/ckfinder/files/20210913_13CA820A5C5D33AB.pdfIn PDF document text
- http://brandweeramsterdamamstellanden.nl/userfiles/file/pedodimolokuwitimukuz.pdfIn PDF document text
- http://reginahajo.hu/_user/file/povoleseg.pdfIn PDF document text
- https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/7b812bruetodp1btv75gqi8ll6/febifobegetubedasate.pdfIn PDF document text
- http://rdmsrl.it/userfiles/files/gukezuwurewinoze.pdfIn PDF document text
- http://dobrejaja.com/Upload/file/lawufuwe.pdfIn PDF document text
- http://midospa.com/upload/files/witixobefutipuxefipaji.pdfIn PDF document text
- http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210916212532.pdfIn PDF document text
- https://liho.cz/UserFiles/File/67790591504.pdfIn PDF document text
- http://rewitex.pl/userfiles/file/vufafidexavibusofaka.pdfIn PDF document text
- http://dtpokebar.com/uploads/files/mikimi.pdfIn PDF document text
- http://satcomlink.com/userData/board/file/lizufipixizuxukimamuxiji.pdfIn PDF document text
- http://luluscafeonline.com/uploads/files/49139743067.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=watch+the+falcon+and+the+winter+soldier+online+freePDF 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_off0000e4a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A2	17852 bytes
SHA-256: `4141779c02a954b2f7bfec3028427527b70ee4c7c202799bba12fcde55d0a97f`
`font_01_sfnt_off000112c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012adb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ADB	10652 bytes
SHA-256: `8a630a2f3305a0eb62b75e112c6d0bc0d282ef323fe87f9d7d438841ad8e032d`

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