Malicious PDF — malware analysis report

Static analysis result for SHA-256 e414bae14d3c8e8c…

MALICIOUS

PDF

88.1 KB Created: 2021-04-19 16:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7fc8abb46aab6da0714f047c0ea3b2ac SHA-1: c5b5473f58e9f65e0fe54fe06b6f4d4d07502364 SHA-256: e414bae14d3c8e8cc2a533b74af4d9da657eda188e508cdea9adf86fbb706de1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as a phishing lure or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=what+to+eat+to+live+long+life PDF link annotation
    • https://cdn.sqhk.co/nomitusibop/gechhjb/star_wars_kotor_apk_download.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/72063695587.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/c4jcjhN/creative_resume_templates_for_mac.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://agent-ritual495.online/avg_antivirus_for_window_7_freemftvg.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/gizotapefod_nuvatagowopal_fonizar.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/12d882577d78e9f.pdfIn PDF document text
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/povad.pdfIn PDF document text
    • http://epaytds.xyz/dutudazibajegiwiparp99dh.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/36079211744.pdfIn PDF document text
    • http://zoneeuro.pro/differentiate_between_workbook_and_worksheet_in_excelx2bcp.pdfIn PDF document text
    • https://wikuxokogex.weebly.com/uploads/1/3/1/8/131872144/f31e4469d77.pdfIn PDF document text
    • http://cz-nitrof.website/25881773406s3qjr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ce8f9d-dbbf-4729-92f0-e7620e2fee86/how_many_books_are_in_the_maze_runner_series_in_order.pdfIn PDF document text
    • http://gejaran.epizy.com/73551036202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5382d036-abd6-4bab-9de9-f48a2391a18a/how_does_god_judge_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d41fbd-e861-4d35-a597-e64b248b594a/free_1st_grade_printable_reading_books.pdfIn PDF document text
    • http://fizojigijuzad.epizy.com/tufagamudelede.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_off00011a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 4828 bytes
SHA-256: dcb4e305e1603b1faff44e23ae8dc014869fad0f9545b674bf4a4ac827466d20
font_01_sfnt_off00012afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFC 11464 bytes
SHA-256: 58428a23e2b5d380b9dcf9d93e6ba9ebb8fa554d71fa4866705440bcd1335110

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