Malicious PDF — malware analysis report

Static analysis result for SHA-256 2822e5190c7c2903…

MALICIOUS

PDF

80.1 KB Created: 2021-05-16 21:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 76515358296feddf5f89688a7ba3fd60 SHA-1: 556733cfb5d3860e4424bcdb7c3ae5bb7508d841 SHA-256: 2822e5190c7c2903d5ac48797c48218bf7dd2edb94468e0fead3ed73c12c271b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a fish finder, which is likely a pretext to direct users to malicious external content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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/strik?utm_term=how+to+set+up+helix+5+fish+finder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426830/normal_6033c0b6035fe.pdfIn PDF document text
    • http://nogeturafo.sportsontheweb.net/ciencia_poltica_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_604729448e0fb.pdfIn PDF document text
    • http://dressnbuy.com/bose_sounddock_series_iii_digital_music_system_reviewx4ez9.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/soluxaguxibuzetulodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6055001b6feac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_6052c248ace21.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/aplikasi_convert_to_word_terbaik_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcda5abf31e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_605c99e1db3c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_6055fa0caa29d.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/active_vs_passive_voice.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/perutexegoje.pdfIn PDF document text
    • http://intereriia.com/nikon_d5100_manual_focus3q81f.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/15043493582.pdfIn PDF document text
    • http://alphabitx.com/nawovuguzetowotaq12lc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_603d49adbb716.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477137/normal_5fe3a7ea3669a.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5fcef9876a4f4.pdfIn PDF document text
    • http://meetsalle.xyz/lexawijonafep96ed.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/area_of_a_circle_worksheet_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 3072 bytes
SHA-256: 32f6344055dd19a747d5dc7be1b996f06d86c40933921117fd9de1b4f8a079ee
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 5164 bytes
SHA-256: bc7478463f4414f2789ee87dcac7eade6116ccd052b66c5c9ca15e98d0a9ee38
font_02_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 11804 bytes
SHA-256: 3d9f70553d66f9c1147c3336a4718ac25c3082d6a279af35d95a7955774bc1c9

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