Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7b110cb4e26c36…

MALICIOUS

PDF

100.9 KB Created: 2021-03-30 12:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 99bbad6b83a1c499008497f02581d54e SHA-1: eee8018c67579160f9225782a960435efd7771ac SHA-256: 0d7b110cb4e26c366669594ecfd0853ff609dfc6f43441d5d375b445729a814d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The primary URL, 'https://gimoguvi.ru/award?keyword=alexander+dugin+books+pdf', is presented as a search result, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=alexander+dugin+books+pdf PDF link annotation
    • http://timekitaparezu.iblogger.org/present_perfect_and_past_simple_exercises_3o_eso.pdfIn PDF document text
    • http://gejobukopap.iblogger.org/pupatitumepujonodipavax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60418a59394c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_5ff9581b367b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5fce4e63ee03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_6043903c1802f.pdfIn PDF document text
    • http://zisesir.22web.org/sewinodawifajuriwalazof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_600f638d0002f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_40e31d0c5264492e83b4b77a7e2955df.pdf?index=trueIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_3c9e96cff73348aa90bbf7096b502821.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_c960e8e4895943519fba81f1f598f18e.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_1b6877fe3c764f6293e5182ce1c697ff.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_40b43be26bf2489abd1818ecb14e92f5.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_0865a7818c2d41adaaf322428af42405.pdf?index=trueIn PDF document text
    • http://xanatilaguweve.epizy.com/annullare_aggiornamento_automatico_app_android.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/83084412027.pdfIn PDF document text
    • http://nujobig.rf.gd/bitematetupoduwuk.pdfIn PDF document text
    • http://numivonef.rf.gd/adventure_communist_hack_apk.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_9be2f383abd64db5ab684887f964ca40.pdf?index=trueIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_0b65e90d97ef4011843c9e67d5edd70e.pdf?index=trueIn PDF document text
    • http://sabasil.epizy.com/computer_problem_statement.pdfIn PDF document text
    • http://wexuvuxidera.epizy.com/consumer_reports_best_tv_antenna_indoor.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_8dae10f59b3048d68db58c04b78df41a.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_557c8dacbd00450fa5afe20561cacb3f.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_off000148ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148BA 5468 bytes
SHA-256: 3dd70aee09fca9b1bf7601e91290a153b5f9772a5986ab7b4357853c352a1256
font_01_sfnt_off00015b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B66 13664 bytes
SHA-256: 8697afd29f4ae17e7f62b3e14372c1002fda9028fd7fa6c1ac613180c0b87e46

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