PDF malware analysis — malicious · cabd6efac7a8d9d6

MALICIOUS

PDF

65.1 KB Created: 2021-09-27 22:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 07fde178e9fe54becd2daafe635b659b SHA-1: bd503fc5dd53d6b12c1bd5837f5d0d0834c8d4f1 SHA-256: cabd6efac7a8d9d67ad4f0116be5a05f902de7b6e3f43315e6363cc52369e882

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9133

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://pistant.ru/uplcv?utm_term=android+checkbox+text+on+left PDF link annotation
- https://magnumattachments.com/ckfinder/userfiles/Files/50106613381.pdfIn PDF document text
- http://taispacedesign.com/upload/files/zekajixal.pdfIn PDF document text
- http://mtkshop.com/images/uploads/file/99090178208.pdfIn PDF document text
- http://jfhconsultancy.nl/userfiles/files/bogifufamukejurakoso.pdfIn PDF document text
- https://cf2019.codefon.hu/js/ckfinder/userfiles/files/tejumafezoten.pdfIn PDF document text
- https://thefencedocumentary.ca/adminfiles/file/wogazite.pdfIn PDF document text
- http://obraz-tlt.ru/userfiles/file/nirelajipiwugon.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/05b66e77d8a765417f130009f98c0ebb/92543243386.pdfIn PDF document text
- http://lidaoxc.com/upload/files/12450307405.pdfIn PDF document text
- https://cafesca.mx/ckfinder/userfiles/files/30565981875.pdfIn PDF document text
- https://factorysales.com/userfiles/files/xojenexane.pdfIn PDF document text
- http://e-restauracion.com/app/webroot/files/uploads/files/80009726299.pdfIn PDF document text
- https://skl68n15g-n2ox.com/contents/files/20350862673.pdfIn PDF document text
- http://sunmoon-glory.com/web/upload/files/8618742812.pdfIn PDF document text
- http://dd-eng.com/files/files/93718495672.pdfIn PDF document text
- http://exim5.hu/_user/file/kinexu.pdfIn PDF document text
- https://hoavily.com/uploads/files/70517031082.pdfIn PDF document text
- https://penzion-pod-rozhlednou.cz/img/file/sebodilevegubu.pdfIn PDF document text
- http://safarang.com/basefile/files/xibanis.pdfIn PDF document text
- http://rentaruedas.com/files/others/83538459218.pdfIn PDF document text
- https://jeanmarcrobion.fr/userfiles/file/xewuzarozuwetukebivuwa.pdfIn PDF document text
- https://i-try.tw/upfile/files/2021/09/27/358465151.pdfIn PDF document text
- http://prunay-en-yvelines.fr/ckfinder/userfiles/files/rumifitekabefilufifos.pdfIn PDF document text
- http://dgxzz.com/uploadfile/file/zuvudegim.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_off0000b099.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB099	14572 bytes
SHA-256: `ccd30af4a4c87234bb01b14a2fe137e7d28229c0cf87d042c9f0a3fe8ccc6835`
`font_01_sfnt_off0000d561.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD561	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ed78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED78	10556 bytes
SHA-256: `bfaedf4a2104ee43a33ca9a622d27f32170c8c15c5904923535157f4deffae28`

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