Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee217b007fb64b89…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 09:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f45a9f1e518e306fd3bdc8b95aa372a4 SHA-1: 628c9170953d123966c777b84cffd29b0d179665 SHA-256: ee217b007fb64b89cbdab2d3efe3d5e830d2574dfe1e0c4e483b41a6280511b5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, many on disposable hosting, suggests a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically. The primary attack vector appears to be directing users to external URLs, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=spongebob+bowling+ball+for+sale PDF link annotation
    • https://cdn.sqhk.co/bezizafosu/ajdEvhi/rugutefipok.pdfIn PDF document text
    • https://tizirabavapamob.weebly.com/uploads/1/3/1/4/131453045/zunafonu-rikewe.pdfIn PDF document text
    • http://ranking-se.com/landscape_in_the_mist_movie_free9t1x4.pdfIn PDF document text
    • http://lalashoppen.online/sharepoint_list_workflow_templatew5m8v.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/c77353bbf4.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Euhghaq/fascinating_facts_about_us_presidents.pdfIn PDF document text
    • http://air-calm2.club/dnd_5e_paladin_spells_listdatif.pdfIn PDF document text
    • https://xizimojagetotom.weebly.com/uploads/1/3/3/9/133997363/79d80cbfa31bf.pdfIn PDF document text
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/4546032.pdfIn PDF document text
    • http://creditpm.com/how_much_air_pressure_for_plasma_cuttervxiqb.pdfIn PDF document text
    • http://itfamily.pro/chicco_nextfit_zip_convertible_car_seat_black_fridaya98re.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://s3.amazonaws.com/dazifozixawus/90086332874.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/que_quiere_decir_una_linea_negra_en_las_uas.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/ischemic_stroke_guidelines_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 5112 bytes
SHA-256: 60cdfb204f094eada1be298a8d8b4c4ed84d61da087324b83f103c984ccb6c28
font_01_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10184 bytes
SHA-256: 75bc824dd0f26022fbd3f1eba4b44136da1a6eed244bdbe1c3888ad5277dddda
font_02_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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