Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f30d44e653f705f…

MALICIOUS

PDF

71.9 KB Created: 2021-04-01 16:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 79a9e27e15258d2890214e1cb1597abd SHA-1: dc675d9853b92b7768e87353b2aff70c1046f082 SHA-256: 9f30d44e653f705fa8c49583d182033d80e91806c6dd0913c077b58a8af93bb8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF documents. One of the primary URLs is https://ponafet.ru/123, suggesting a potential phishing or malware distribution campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm the malicious nature of the file, with ClamAV identifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=parquet+format+example PDF link annotation
    • http://gosejoligezo.iblogger.org/bit_by_bit_english_book.pdfIn PDF document text
    • http://talemine.getenjoyment.net/bilingualism_in_sociolinguistics.pdfIn PDF document text
    • https://cdn.sqhk.co/bamopilu/jd2Eogd/692606555.pdfIn PDF document text
    • https://gukenesiwedik.weebly.com/uploads/1/3/4/7/134735424/sovujutebar.pdfIn PDF document text
    • http://jasetukuxazep.22web.org/ripefa.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/poem_analysis_essay_example.pdfIn PDF document text
    • https://wigufigavotafo.weebly.com/uploads/1/3/1/4/131452860/9526065.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/jYghGGG/95381208874.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/ifliejf/force_saber_of_light_app.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/auxiliary_verbs_exercises.pdfIn PDF document text
    • http://xugerovogubex.22web.org/fatit.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/strategic_business_unit.pdfIn PDF document text
    • https://cdn.sqhk.co/vilevefe/MQghhg6/brick_game_9999_in_1_game_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genuziga.epizy.com/bhagavad_gita_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/iracing_setup_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/12001042963.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/transport_through_the_cell_membrane_answer_key.pdfIn PDF document text
    • http://rupawuvafe.rf.gd/fosanutopava.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/91356494284.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/89311670084.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/25971474995.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/anatomy_and_physiology_of_hearing.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_off0000dea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 5064 bytes
SHA-256: 5785de71f500ba4eaa3fdd8c2d73565b7633b44020e44fcd9f4831a2308298b2
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10148 bytes
SHA-256: 1ca05f49b8b92f7bacb2625f58211b4b0c8413489f843141a3f8bc9452ed848d

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