PDF malware analysis — malicious · 46bb0ab54ca6a54f

MALICIOUS

PDF

70.7 KB Created: 2021-09-12 22:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ebd823cf77c62e623149bb93616c5de4 SHA-1: 82178eb73b10354d5536ba69b61b6b4fbb52213d SHA-256: 46bb0ab54ca6a54f45e882fbaefde81508c9482b94e3899a6525649733071255

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a pattern of hosting multiple PDFs on distinct domains. The presence of these links suggests an attempt to direct users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.7377

Heuristics 4

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.
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://k3projekt.pl/uploads/userfiles/files/kefetitugafosuxapukom.pdf In PDF document text
- http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/lilepubezixu.pdfIn PDF document text
- http://tindangnhadat.vn/upload/files/wuduvowufewovaxik.pdfIn PDF document text
- http://saharun.org/uploads/ckfinder/userfiles/files/bexejinuxajelofapesepa.pdfIn PDF document text
- https://rjpexport.com/files/31297673044.pdfIn PDF document text
- http://kleiberit.ru/files/file/bunekovukamudilaloguzok.pdfIn PDF document text
- http://thebeautyofdesign.nl/ckfinder/userfiles/files/sunavidixitovogunije.pdfIn PDF document text
- https://unique-u.biz/images/uploads/file/xokuwefivolevixasul.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/loguwijoxitewojidi.pdfIn PDF document text
- https://comtraining.cl/userfiles/files/barisiwuposuwunedapuli.pdfIn PDF document text
- https://sgcaregiver.org/contents/files/rigowox.pdfIn PDF document text
- http://tsnpharma.com/upload/files/nobome.pdfIn PDF document text
- http://sevimticaret.net/userfiles/file/28549242886.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ubivl9k801fjq97h9983ea6i3s/jedotadur.pdfIn PDF document text
- http://konditsionery-odincovo.ru/upload_picture/file/16500822794.pdfIn PDF document text
- http://jgweld18.com/UploadFile/file/20210909071550668.pdfIn PDF document text
- https://uat-tunisia.com/userfiles/file/vunibur.pdfIn PDF document text
- https://bi-kiesabbau.de/cmsimple/images/file/70690947704.pdfIn PDF document text
- http://vidol.nl/userfiles/file/81702033788.pdfIn PDF document text
- https://tefen67.com/userfiles/files/wupuluwinonurulamusuref.pdfIn PDF document text
- https://gkia.org/kingkong/userfiles/files/dewubasasukulale.pdfIn PDF document text
- http://czerwoneiczarne.pl/files/file/defiba.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bendy+and+the+ink+machine+free+download+for+androidPDF 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_off0000b9ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB9AB	10916 bytes
SHA-256: `c3e6940c5490f992e1d0200894bf6a99bdb99c0473fe17bbd09f99a14db2be53`
`font_01_sfnt_off0000d2d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2D2	19464 bytes
SHA-256: `8cc5b9a191e7317254af9af84afe773405c88380a356809c4f2100e0820767a9`
`font_02_sfnt_off00010519.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10519	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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