PDF malware analysis — malicious · 5b25fc1f8f6aaf28

MALICIOUS

PDF

79.0 KB Created: 2021-06-08 19:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 03d85487b827dde39e69e60e92765bc1 SHA-1: 123737d5c655dfbfb21fd5d98a0123a2e921a1ab SHA-256: 5b25fc1f8f6aaf28bcc86892889faa7ad4f3461a2e7311c835f4edb2fac13988

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 0.9755

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
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://inwebjor.ru/uplcv?utm_term=mukabla+song+by+ninja PDF link annotation
- https://zanhotel.ro/beficientconsultingFiles/file/95937167273.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/osfd64peffkod6111nbeci5g7l/66816197417.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b2aa711ac622b7fbbc9b912bf4faee63/23504041765.pdfIn PDF document text
- http://georgekoldun.com/var/upload/file/nixazominar.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb005929b2---mudujabofewegavujol.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/i99ctncfh0769jb1r7uor8kab1/dodutexap.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/94723643303.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/29ae4469d5b42ed5cb3a5c8464dfd079/rabanazedasoteguwanop.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c96a381d79---lizitowososologubanobog.pdfIn PDF document text
- https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/5d98j7cmmo3p6rditn4rvoi1p4/881731326.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/dca37d740f3fc170493c8c71e75fa9a0/81077203976.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8064f5434490672f3bfed807b366b535/96808569646.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfecee4f2a---37498367854.pdfIn PDF document text
- https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3e4488b3d203bdb5a3db39b452a962a9/16755871519.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e663b6db19---wogaxipapumigumomapakele.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/60109373c37460a7c8339e43b1a3dca0/xedixeduzajiso.pdfIn PDF document text
- https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/c3gkip4p2te4dj5hqum09dsnqe/laleritujebodav.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8805e94c---63653625855.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off00013301.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13301	3414 bytes
SHA-256: `adb93054ef57001d075b29b6499fd2057bc27beeb596bc9179c5e2804bf25c46`
`font_00_sfnt_off0000f02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF02F	3432 bytes
SHA-256: `b4ca51dde2f8e297dbfa15e84ee291eb5dab1aee9a7ccb47c0455f93c42440e7`
`font_01_sfnt_off0000fc76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC76	5144 bytes
SHA-256: `8f7afb8e5b8df2add86bb43cad673fdb3e898ad90ef512771f97856aa022f9c5`
`font_02_sfnt_off00010e28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E28	10788 bytes
SHA-256: `1985ab881b15dfe0d2eb1c1ff7c00ed769a30215600255349773218aa1cdc774`

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