PDF malware analysis — malicious · 42e09a7e1bbd4b98

MALICIOUS

PDF

74.8 KB Created: 2021-06-09 00:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: a1d2e92849b873eb753c400431c9bf9b SHA-1: b722ebf1cfa16567ec7526ee2d7be1b7b2f0e2d9 SHA-256: 42e09a7e1bbd4b98538d72badc0686c8dd48cc7265029b8284d5ff12313ce935

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8116

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://ketchas.ru/uplcv?utm_term=weathering+with+you+watch+free+online+eng+sub PDF link annotation
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7fd8f945827c3ca9516a10e130bd5495/wiribeposokab.pdfIn PDF document text
- http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a729daee090---55688175874.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/muvokususavut.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20ac311f99---zobizazelibabegefi.pdfIn PDF document text
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf619b2571---masasugurerolok.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607257ecd4fad---89146796194.pdfIn PDF document text
- http://amdind.com/userfiles/file/bifaba.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab900792d4f8b4c6adb1745c10352f20/48871325074.pdfIn PDF document text
- http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/0916ad9df88e7c1aaa35336f8d8bd6b9/47260821106.pdfIn PDF document text
- http://geometrabottero.it/userfiles/files/dixatenokazabo.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dfa0b25b4---fedukunonivenufifit.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e293820c9---xujogoxobixasokeji.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c515a0ea0---fefiguguzewezanomob.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160805c3d785af---tipuxotidefowafepifotoz.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/993466c41e289c64b2815d428e214345/fozumivudibitopevob.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e90163e0fc---baputonamometolip.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02eaeea62---vorepodat.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085ac7aff6---26802441801.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/co6q827ftpklismu6ga91vhlu3/3699451132.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160763ac953939---nesavusomosefuguvexusiluj.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eca5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECA5	3596 bytes
SHA-256: `dc4cbf7244888e59fd7ca8ad46040ddb3bac4bad93a30afe6dfd5a3ef2e7f526`
`font_01_sfnt_off0000f99d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF99D	5488 bytes
SHA-256: `f6d8290d2faeda2044ef295e345ebe557a3e29e4dc69b8135d348b7c715ba4ac`

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