Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eea42c1261874b…

MALICIOUS

PDF

94.3 KB Created: 2021-03-08 13:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 61bdb967ea01a24e944ec3c0e354fca8 SHA-1: 8421b8366eb1e90c115c4222c61fb7d8b158a5e0 SHA-256: a2eea42c1261874b62ad43e9af307376b0cdcec4f0f43ce9b3e868429b6c41f5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected it as Pdf.Phishing.Trojan, and ML classification yielded a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://fokemale.ru/award?keyword=ap+english+literature+multiple+choice+pdf PDF link annotation
    • http://cashthe.ru/91784777245wpc61.pdfIn PDF document text
    • https://levevuwakute.weebly.com/uploads/1/3/4/9/134904524/nesubetew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fd369e27010a.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/jimaxelifajivenalozonozab.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/wofavojawi-mujiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446944/normal_6036daa6b7932.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/sri_rudram_namakam_chamakam_telugu_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_601f14e1bd6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_60164ef4cbc17.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/lojosi.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/seoul_metro_map_2018dhbv5.pdfIn PDF document text
    • http://lishop.site/phoenix_lol_sheet_musicrzcpv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_8f04e26acb0145f389e63d90213ee529.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_35caee89be4b49faad0c92ee9e92c889.pdf?index=trueIn PDF document text
    • http://mifojizu.myartsonline.com/html__css_tutorial_and_projects_course_free_download.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_2fa7c5e5b8b841f8b052ba6b3959c47a.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_c0cd36018ea644c2a9dda6bf2e3ff2d4.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_60bc537b23374ca78af740344365633a.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_66acd4084b524be6b412cc0b069f6a32.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_97d2529339cc4a12b6d07d9fbb614655.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_dadd8b082b0f4290941217e2b66044fd.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_f1aeaaae847f4f5ebc0b76ee58b0f814.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_49b3c913299a4714adc6211308d2d986.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 5440 bytes
SHA-256: cea34f768cb8d5fe314fda3dee5ac73f1fe665af4a3d85c79c61c6bc54359bcd
font_01_sfnt_off0001394d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394D 11016 bytes
SHA-256: 5d09d1e919ef112f6d9a8d42516e5e4d88bffd610612a7dd70a91c2a47dced59
font_02_sfnt_off00015eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EAC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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