PDF malware analysis — malicious · f12a304b173b58e7

MALICIOUS

PDF

60.9 KB Created: 2021-10-01 03:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 92cf869eba436c7a4ebb619d0ea61ea0 SHA-1: ab6ea108870ef93d1e3fd996f6f5dd609a753546 SHA-256: f12a304b173b58e73979b28f810c24389c3e862224abb146f8f47c502b3c4d2b

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to various domains, indicating a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malware or conducting phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely related to spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.6052

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nomylo.ru/uplcv?utm_term=the+narrative+of+arthur+gordon+pym+pdf PDF link annotation
- http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/89309571400.pdfIn PDF document text
- http://uelzecht.lu/userfiles/files/85493830186.pdfIn PDF document text
- http://www.srijonihealinghome.com/fckimages/file/6327676057.pdfIn PDF document text
- http://gotoippc.com/ckfinder/userfiles/files/lenevigiloxozuxovugu.pdfIn PDF document text
- http://artdental.hu/editor_up/66506302898.pdfIn PDF document text
- http://syuncyoku.jp/upload/file/bupafewudowegerulesod.pdfIn PDF document text
- http://bhavalaya.org/ckfinder/userfiles/files/58958640345.pdfIn PDF document text
- https://esperidiaogomes.com/userfiles/files/nilojogofixovuvuguvonub.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bbc4d86f0---daxuref.pdfIn PDF document text
- https://o2opr.co/userfiles/files/xanakuduxegodivumus.pdfIn PDF document text
- https://somogyplusz.hu/files/vojesegifunate.pdfIn PDF document text
- http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///88395013967.pdfIn PDF document text
- https://dukumanis.com/contents/files/gurilijopowavusujeram.pdfIn PDF document text
- http://ourdesign.hk/ckfinder/userfiles/files/puxaniwalux.pdfIn PDF document text
- https://htcpost.vn/vietpost.vn/img_content/file/zuberewutarejuvipa.pdfIn PDF document text
- http://burelomdo.com/ckfinder/userfiles/files/mizazofogigara.pdfIn PDF document text
- http://119pump.net/d/files/taxip.pdfIn PDF document text
- http://clearspace-design.com/CKEdit/upload/files/bazegixojawejategapakabas.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614441a05cf12---73891574916.pdfIn PDF document text
- https://bem-sa.com/img/file/8422800031.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000aed0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAED0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c6e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6E7	10972 bytes
SHA-256: `0848141a3db839393ccfde48d28a6f9ee0282db5942ec3f2df19643c5dbdc018`

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