PDF malware analysis — malicious · b50706a0f568a9f7

MALICIOUS

PDF

67.5 KB Created: 2021-10-01 07:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 4cb8e17dd00a1c17e8ef50fb2857a4f4 SHA-1: 6c0460835d04c965f1b2276621ceb5e6f94aaa30 SHA-256: b50706a0f568a9f72c73ce9d3807ade12bf244b2d327bbe3388bcd3c43fd7b5f

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to other PDF files hosted on disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior, suggesting an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the overall structure and detection point to a malicious intent.

Machine Learning

Nyx PDF Classifier clean score 0.0950

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://www.jindatunnel.com/up_files/file/fudiraroxifawuxe.pdf In PDF document text
- https://podgoricki-klub.me/userfiles/file/pukogifixig.pdfIn PDF document text
- http://mtsskzy.com/userfiles/file/fevazi.pdfIn PDF document text
- http://ajej.pretty-match.com/upload/files/23440093186.pdfIn PDF document text
- http://hotelamadeustorino.com/userfiles/files/1696133433.pdfIn PDF document text
- http://colokit.thienlonggroup.com/Images_upload/files/62126087775.pdfIn PDF document text
- http://flashdisplay.net/UploadFiles/FCKeditor/20210908012324.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16151cb209413b---98892834078.pdfIn PDF document text
- http://acrclubinversores.com/files/galeria/files/wamexaremupekujufima.pdfIn PDF document text
- http://kindergartenhelden.at/upload/file/wesojalejirasajonevogufof.pdfIn PDF document text
- http://warehousetraining.ie/images/binuzipibidefazobadoxov.pdfIn PDF document text
- http://yztools.com/images/upload/File/napujujazeg.pdfIn PDF document text
- http://ambulanceservice.pl/userfiles/file/10627798642.pdfIn PDF document text
- http://tsnpharma.com/upload/files/rifolo.pdfIn PDF document text
- http://objets.immoweiss.lu/userfiles/files/85030162447.pdfIn PDF document text
- https://hgb.se/filer/file/buguluwaxemorinivalag.pdfIn PDF document text
- https://nbc.com.vn/ckfinder/userfiles/files/4265727972.pdfIn PDF document text
- http://eapver.com/upload/ckimg/files/202109121433002892.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148e7c39c66d---89644319550.pdfIn PDF document text
- https://fo-prefectures.com/pages/files/11690294149.pdfIn PDF document text
- http://jfhcoaching.com/userfiles/files/toredegutisoxeluveti.pdfIn PDF document text
- https://eravikulamnationalpark.org/ckfinder/userfiles/files/podifugowekuliresezu.pdfIn PDF document text
- http://rucodelniza.ru/userfiles/file/madelimozivumesofalud.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/94029268885.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=videoder+video+downloader+new+versionPDF 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_off0000b2a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2A3	10264 bytes
SHA-256: `2bc2dae0a8ec2047ab01cd4e876e51b2fb52a88e77ce54edecc7da902f9ea83a`
`font_01_sfnt_off0000c9d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9D1	15532 bytes
SHA-256: `29d6d0e61fbf75f6c106579ab69203c70825fefff7331c6e079d6d6e40f65e86`
`font_02_sfnt_off0000f131.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF131	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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