Malicious PDF — malware analysis report

Static analysis result for SHA-256 f582777227d9b898…

MALICIOUS

PDF

82.5 KB Created: 2021-03-17 06:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: eb2c427d95a6c918fc24b7cf06f9a497 SHA-1: 99260377ec36b99aec5a93adb041f943f8468f62 SHA-256: f582777227d9b898f3c22885bbfba60caef37c88a5755c5c88ed8a33d85c334a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to educational content, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://xezojetit.ru/wix?keyword=basic+chemistry+for+biology+students+worksheet+answers PDF link annotation
    • http://fetedeju.mygamesonline.org/disease_caused_by_air_pollution.pdfIn PDF document text
    • http://patewukezevo.iblogger.org/gb_whatsapp_beta_free.pdfIn PDF document text
    • http://noverst.xyz/subject_pronouns_exercises_for_grade_2b8h8o.pdfIn PDF document text
    • http://bridgecommerce.com/moleneledex8p2h.pdfIn PDF document text
    • http://rabuvuz.22web.org/cayley_hamilton_theorem.pdfIn PDF document text
    • http://xunajoza.22web.org/boston_acoustics_subsat_6_specs.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/power_scrub_spinscrub_50_manual.pdfIn PDF document text
    • http://xunidar.iblogger.org/bowizejatevomipo.pdfIn PDF document text
    • http://wurogutevifo.iblogger.org/teamwork_answer_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_9ff2e4ba15e9491d88e6e41704ba620e.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_b56f0baabd774c6887da9923b50a8863.pdf?index=trueIn PDF document text
    • http://bagugexasorip.myartsonline.com/91132328316.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/70350775641.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/toyota_jit_case_study.pdfIn PDF document text
    • http://torowenakatum.epizy.com/78285081505.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/puraxesa.pdfIn PDF document text
    • http://xitozafa.epizy.com/66745633196.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_e16666bcbbbe4a9892728d5f1941639d.pdf?index=trueIn PDF document text
    • http://ziwivazud.onlinewebshop.net/65224306201.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_13079f0aca8644e6b18d1e9db4386cba.pdf?index=trueIn PDF document text
    • http://zasasopatadinu.epizy.com/41516352763.pdfIn PDF document text
    • http://gumuwojurigab.epizy.com/86998124162.pdfIn PDF document text
    • http://lolukojalima.epizy.com/gresham_oregon_police_reports.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/20304949830.pdfIn 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_off0001014a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 5884 bytes
SHA-256: cdf576da8b47caa3d09897bed77e6b856bced6735e479f8a5c862f3806c83675
font_01_sfnt_off0001153d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 11604 bytes
SHA-256: a20676ca9cba0d5865c449bf437a91eb2310ee669ca6ff3b23be67ac0cede977

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