Malicious PDF — malware analysis report

Static analysis result for SHA-256 416f0deb00a41717…

MALICIOUS

PDF

75.3 KB Created: 2021-05-06 02:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 518cc77a0b21fabbce7f9602458535f4 SHA-1: 9f425b19cf5bf142ac2014adf3514fda22630ec9 SHA-256: 416f0deb00a41717df1f50ecdbe4e8d402484fb5a3d66f4029e33f0293d3b461
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://leonvi.ru/strik?utm_term=flight+simulator+xbox+one+release+time PDF link annotation
    • http://konsalting.info/sipasexijefegovifagd2z0.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/4f7ffc29dfca.pdfIn PDF document text
    • http://rubeatyshop.xyz/pudabizarurasaxofireko9zo1p.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/647746.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/jcxchgo/58317740640.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/26783317813azb2t.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/idp7EWg/fofuwinajolajele.pdfIn PDF document text
    • http://studytogether.fun/bozuxiveridabojokedases37m4n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_e6b23b2ce17f4f2ca1321642264af343.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98026607-cbb4-4064-bcd0-5b8c0c44ca6b/29285878581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8bad8d-548a-4cf9-8424-011169329503/matlab_function_syntax.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_556905c36a2447b3b528248bae367652.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67166e50-63f3-4003-8583-899d40288486/is_value_dead_again.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3dc3d3-797d-460e-a2a3-0ebe09787523/15006942255.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_afe103af9f9d45d89f38e77943802df6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78d6d45-c9c4-4afa-9798-2c65804d734c/bosapanabagozudalexoli.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_dc36d20b41344221955cfcd807a576b1.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_166e9ef5a97f4d1e90135ed8f4ed3e53.pdf?index=trueIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_ad2827970eda46408d77ff001a54f65f.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_1d72992391104365a54f900ad9cc9330.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_4ac04522fe27470aa8140c14515259ec.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 5260 bytes
SHA-256: 76bd0ce7918e554cfa0f32d0879190918b893e68009a5d7cf80c2b519ce235b1
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 10860 bytes
SHA-256: 2d2575bebf3ca100482f5b401bd29389a085cb47ebfff07f1c6012c87086ad9e