Malicious PDF — malware analysis report

Static analysis result for SHA-256 953e574865b91cf1…

MALICIOUS

PDF

80.6 KB Created: 2021-02-19 23:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5467816771f76dbcd5f5daa3b544468a SHA-1: d43ccf29466ab31a022a448bab83e1a2d311d978 SHA-256: 953e574865b91cf1269016356b02c67baf728a88439b63aaa44255895c2c9fb2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=what+is+share+your+update+to+news+feed PDF link annotation
    • http://podarokinsta365.site/cd_sleeve_template_publishersag73.pdfIn PDF document text
    • http://edarudost.online/song_of_solomon_8_2_meaninghyaz1.pdfIn PDF document text
    • http://freedate18.xyz/vugutebesbofq4.pdfIn PDF document text
    • http://allieshouseofhope.com/photoshop_cs6_for_mac_crackove4e.pdfIn PDF document text
    • http://get3creditscores.info/dopanidogewuvekivagodqv90z.pdfIn PDF document text
    • http://kdghy.online/jokixilajatedotajafimipocwamq.pdfIn PDF document text
    • http://resimpub.com/ihss_timesheet_training8qn3a.pdfIn PDF document text
    • http://my-favshopf.online/reese_pilot_brake_controller_wiring2od8s.pdfIn PDF document text
    • http://study-english-05.site/clarke_trumpet_book2klue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372101/normal_60061d037d2f8.pdfIn PDF document text
    • http://whysmall.space/80151046735q3442.pdfIn PDF document text
    • https://moxuzoketo.weebly.com/uploads/1/3/1/1/131164531/karat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fe1ae0878439.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/pibodekadaxubod.pdfIn PDF document text
    • http://naturebiolog.space/list_of_adjectives_english_spanish864xo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_602b25572bb3e.pdfIn PDF document text
    • http://big-ita.space/the_white_tiger_film_plot_summary6sz0v.pdfIn PDF document text
    • http://probkin34.xyz/663152265610bfsf.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
    • http://posugez.epizy.com/55931275883.pdfIn PDF document text
    • http://fetapewifug.epizy.com/sample_hr_manager_resume_templates.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_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 5188 bytes
SHA-256: d12238815583695ca4df3ab181205136f41f4faf7aee36db1a2fb1d2fc392a31
font_01_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 11356 bytes
SHA-256: a4f81a9fa5c84819445e8e8d26c63cb401508f82639e45dc063440f95ac67654
font_02_sfnt_off000126f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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