Malicious PDF — malware analysis report

Static analysis result for SHA-256 306b1c8ddcd3e9c0…

MALICIOUS

PDF

102.8 KB Created: 2021-05-15 20:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cc7a5c0b960c90a671df2b0bf81654e6 SHA-1: 3c7fea2f89555d1bcaad15c59af7de27b616a870 SHA-256: 306b1c8ddcd3e9c0a71b9f88ef13659a8749f58474d321bd2177e77987c4cb72
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 hosting, and one heuristic specifically identifies it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=explain+what+is+meant+by+urban+area PDF link annotation
    • http://sberhome.ru/lufidaturanebudiwuoodxn.pdfIn PDF document text
    • http://pimolala.22web.org/file_clerk_job_description.pdfIn PDF document text
    • http://praktika-ingenieur.com/android_checkbox_coloryun1w.pdfIn PDF document text
    • http://shoop-fh.ru/amazing_wallpapers_iphone_11_proqgln2.pdfIn PDF document text
    • http://jijufik.22web.org/xelanazukogirelogotijiw.pdfIn PDF document text
    • http://ogranicbio.fun/85934199621acpyr.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/zegugeja.pdfIn PDF document text
    • http://obuv-kozha.ru/how_do_you_get_facebook_on_samsung_smart_tvxrlmo.pdfIn PDF document text
    • http://sokadap.22web.org/81999444591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navunegovexad.rf.gd/jixuwarekepilap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6821d04-24e2-41e3-8989-9bd9ccc6a6bf/romeo_and_juliet_act_1_summary_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d3f562-936e-40fe-97ff-76865778e510/does_gimp_work_on_ipad_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ebb09dc-622c-4224-8e84-e52c97c61c1f/44777690157.pdfIn PDF document text
    • http://gikifipililiza.epizy.com/what_causes_convergent_plates_to_move.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/aggiornamento_android_pie_huawei_p10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c41563-0877-48f0-b375-367745c6a0b4/nelibekololozawozoruda.pdfIn PDF document text
    • http://libiwozurogufo.rf.gd/viwilimanizixeduz.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/tent_card_templates_6_per_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vasataxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/vapoxopijakawuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/logic_gates_symbols_free.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/ey_internal_audit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00f01b9-eceb-4024-94d2-3b93930e3df7/82753363518.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_off00014af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF0 5416 bytes
SHA-256: aa504488b935645cde8ea4f440cf1b3c069a80ba39a1c356d63572143b02c2a1
font_01_sfnt_off00015d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D48 18052 bytes
SHA-256: e692f3519987dd36705741d7230f45b5ec6244117a29d9f048527d10bb234220

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