Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b505f3d661d240f…

MALICIOUS

PDF

118.0 KB Created: 2021-03-19 22:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9b21aedcc886693ecff67e30bb14bdbf SHA-1: 16e053883496f2ee94f3b0acf9d8075563e77f73 SHA-256: 1b505f3d661d240f72faf786f22817657a9deb0440413649a222c2ce15f13537
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs, 'https://soxebez.ru/award?keyword=definition+of+multilingualism+by+authors+pdf', is likely part of this scheme, aiming to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9515

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=definition+of+multilingualism+by+authors+pdf PDF link annotation
    • http://zuzatew.medianewsonline.com/miwarojirejomewesuru.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/ihggiKV/94076001070.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/hjjbahb/60657897618.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/xufenefeliga.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/fqjljiL/wish_me_luck_lyrics_wallows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_a783704dd3904962be2b6cebdf598663.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_a1dc125271854a49b1423092b19ddef8.pdf?index=trueIn PDF document text
    • http://zogoxuf.atwebpages.com/99899600438.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/ripikut.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/proform_xp_580_treadmill_for_sale.pdfIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_9bd75c152500447999ca28f9966665cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/570425522.pdfIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/dagevebap.pdfIn PDF document text
    • https://e6343aec-df69-40e7-9959-3c0c55bf73c9.filesusr.com/ugd/6a9017_1335891e7be84c98a3535830c606d3e8.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_05a9731e5c3544cd97f78e034537edfb.pdf?index=trueIn PDF document text
    • http://pidodexogejax.myartsonline.com/1607173680.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_8d124629e59a46e9b999cf8c3f148b0e.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B88F 5696 bytes
SHA-256: 224b71d320be4ee122c17029845d7bb3ff95e99d3fb00206f30e504409f2a9b8

Open this report in the interactive analyzer, or submit your own file for analysis.