PDF malware analysis — malicious · 87156fac6299203b

MALICIOUS

PDF

70.6 KB Created: 2021-09-20 01:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: cb91ea109658070f6ed7360494d7b4c7 SHA-1: 65133d28d7b93a5e76b4bcb5e650e8850fb7d9c4 SHA-256: 87156fac6299203b05957742c3c0a11914668ae4f9283c1ac1ea83be9a2ed2b1

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a high density of embedded links pointing to various domains, suggesting a link farm or phishing lure. The presence of numerous unknown reputation URLs reinforces the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.5610

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 https://novahealthclinic.ca/userfiles/file/zobitubedaj.pdf In PDF document text
- http://astprom.ru/sites/default/files/file/jisazajumu.pdfIn PDF document text
- http://coytex.net/ckfinder/userfiles/files/godudetuf.pdfIn PDF document text
- https://doina.md/fckeditorfiles/file/mudekisotefizosepa.pdfIn PDF document text
- http://aligokdemir.com/resimler/files/xiderujisenodoputuzu.pdfIn PDF document text
- http://studiolegaletrotta.eu/userfiles/files/65307039573.pdfIn PDF document text
- http://sicilalluminio.it/userfiles/files/raxaxegozeb.pdfIn PDF document text
- http://www.kevimotor-rock.hu/files/files/wurur.pdfIn PDF document text
- https://bodymason.com/user_uploads/files/buwaxetu.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139406932b5a---28220032392.pdfIn PDF document text
- https://vientangluc.com/upload/files/36771883594.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/7eb4ba5705928e424b567395037112ab/semoxok.pdfIn PDF document text
- http://winecellarkeeper.com/ckfinder/userfiles/files/tudipowojo.pdfIn PDF document text
- http://maroba-zirndorf.de/file/basisufufudelovazedozez.pdfIn PDF document text
- http://phdpecs.hu/userfiles/files/29690519424.pdfIn PDF document text
- http://propertiesforrent.com/userfiles/file///83950402296.pdfIn PDF document text
- https://morganmethod.tuesdaytrader.com/ci/userfiles/files/35527820011.pdfIn PDF document text
- http://gourmethousemacau.com/UploadFilesfile///tajesakuwuzuzesebuk.pdfIn PDF document text
- https://nedimgame.net/calisma2/files/uploads/7162401586.pdfIn PDF document text
- http://codienlanhminhquang.com/upload/files/tugoxigimigemanotaxulude.pdfIn PDF document text
- http://jujucuisine.com/userfiles/file/95989802442.pdfIn PDF document text
- https://agri-mal.pl/userfiles/file/vejezikososakagofoniseteg.pdfIn PDF document text
- https://dveropolis.ru/upload_picture/regiritijub.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=m31s+live+wallpaperPDF 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_off0000c068.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC068	10292 bytes
SHA-256: `55b2b9bba36e1a9b6fdc4b5d31181ca3702a6f53d9dcd0c8f5424fbff8eb286d`
`font_01_sfnt_off0000d7cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7CF	16932 bytes
SHA-256: `74679e457f29ce952611fe1b728c6318d07817589730b4787c0017c9444fc05f`
`font_02_sfnt_off00010397.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10397	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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