Malicious PDF — malware analysis report

Static analysis result for SHA-256 30086f97a43de08f…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 08:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6251ecc07b2d2639b5137b66593233ad SHA-1: a8081abee7cf0fe298658b448b3aa4cd70ce4c59 SHA-256: 30086f97a43de08f0d9da015d35f2a789a1e3249e945329124fc2b07480609a8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely spearphishing.

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://xezojetit.ru/123?utm_term=what+is+this+thing+called+science PDF link annotation
    • https://cdn.sqhk.co/vetejevibas/0vgd0jj/jubisi.pdfIn PDF document text
    • http://veletekuti.66ghz.com/5396376112.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/nusigiv.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/insinkerator_badger_5_reset_switch.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/tolokisizitawijemaluseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fd8835ff34d9.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/how_to_connect_anker_soundcore_liberty_air_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411696/normal_5fdb5c092664b.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/dewalt_dws780_miter_saw_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/fidinananale/fpieahd/bow_land_wiki.pdfIn PDF document text
    • http://larebalin.mypressonline.com/equivalencia_neumaticos_moto_pulgadas_a_milimetros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fc9608ee65ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_602e2572a1eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422645/normal_601a0207e0563.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/hgcgfhf/megan_is_missing_full_movie_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwusawoviwu.rf.gd/bts_album_answer_spotify.pdfIn PDF document text
    • http://bomajada.epizy.com/vowakugoratosikij.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_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 5116 bytes
SHA-256: 1e1ba310466cb75948687b0ca6baa2fda02537fb95eb9ff4f5b7767f6f3bad60
font_01_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 10600 bytes
SHA-256: dd473dcd78717e2ffe2d45c3a8dde90ac7e9b630773ca8182af251b8b21b026d

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