Malicious PDF — malware analysis report

Static analysis result for SHA-256 90410707e3b3bc6e…

MALICIOUS

PDF

82.7 KB Created: 2021-03-18 06:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 53f669e565bf90891131841344b9fc8c SHA-1: 5f71c0faec60ed1354076ee9f0a8619d774b3b1c SHA-256: 90410707e3b3bc6e778a4851be2afa60a1519192ac5698ce1aaed9ab318cf1c8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of a URL with a 'keyword' parameter indicates a potential phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://midufefew.ru/wix?keyword=torque+burnout+hack+2019 PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/emjcjfC/fipejezofakez.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/gjyjhia/dirop.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/Pgj0hgo/nobosune.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/RZ5o7hd/45442941365.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jsyijl1/29175991291.pdfIn PDF document text
    • https://cdn.sqhk.co/kizewetete/FqShgcR/zekelex.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/iaXJlhg/59138715844.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/C5hdijB/how_to_switch_off_roaming_on_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gQhaApT/big_wings_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_bf998ff230d9463ab85a02ccfb1dbf34.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_d0bd734c962b48028d36cfa0a0e37b44.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_f10d5d13eb214a87bd93b7e4afbcc4c7.pdf?index=trueIn PDF document text
    • https://c0add167-8731-41f0-9a7b-3d62f09b0499.filesusr.com/ugd/879476_c68713c55cea4bf7b433a5f34fc04af3.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_91bffc1ba963488dbf1fdc35aded69ca.pdf?index=trueIn PDF document text
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_a41546dd01d540b0abbaf3fea1d918c9.pdf?index=trueIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_da5892ffb0bb42d6a0bcb2ebf3fb4df3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3707b8c9-e715-48cb-88d6-04f8ae57d626/juice_detox_diet_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3456b4f1-6c75-4b6e-9635-76a817a9224b/acordes_para_piano_musica_cristiana_para_principiantes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5986d403-3b67-403c-bf8c-3d985b30ff37/art_pro_mpa_ii_tube_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4dc6eb-813c-429e-94e7-83e138dab635/83186619118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d94b204-774b-4550-9e66-ce0c9c0a9259/mexodifanedogibudesoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d151b33d-4288-4e64-9844-b1dc01b93bf6/92361981907.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_862081a2ad714b8da27eea4cd4452d3f.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_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5436 bytes
SHA-256: cc1dedc84f06af6a816e87678bf23edbc16937679bc550b71e6215c0c235229f
font_01_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 22636 bytes
SHA-256: 418ae9b8abc6b2f3c3d3bd638328b578366c686a8852215ae22a782ff0e8cef7