Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c0f01c6680b382…

MALICIOUS

PDF

89.2 KB Created: 2021-04-26 10:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 608da2ab91241d20e50dceb1d7171576 SHA-1: 2497d6bbb980f3b9d23e5fcf19f1424ad746358c SHA-256: c7c0f01c6680b3827230282c639f8690d1e1d168cdb6ea6e0360ac57dd453e0e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'ponafet.ru' with a 'microsoft access tutorial for beginners' term, suggesting a lure. The PDF is also identified as a link farm on disposable hosting, further indicating malicious intent. No scripts were extracted, but the presence of multiple suspicious URLs and the overall classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=microsoft+access+tutorial+for+beginners PDF link annotation
    • http://mapenibo.scienceontheweb.net/arithmetic_reasoning_shortcuts.pdfIn PDF document text
    • http://psychologyrelax.xyz/what_does_professional_development_mean_in_childcare9n2op.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/cual_es_el_proceso_de_investigacion_cualitativa.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/kawigupapujujaxukigarat.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/pagopukokasuxuj.pdfIn PDF document text
    • http://futigovu.scienceontheweb.net/birufikoresile.pdfIn PDF document text
    • http://supusatode.sportsontheweb.net/bengali_letter_writing_book.pdfIn PDF document text
    • http://aslixan.com/macromolecule_comparison_table_answer_keya41yd.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/female_baby_names_in_tamil.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/dsc_neo_hs2128_installation_manual.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
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_0c4305f72996456da42a5743165ca189.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_671f948d5c0c4e5ea96249f8f959fc56.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_66ed7d56bd38463d824b9ed0248e11aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/legotewexef.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/chaos_movie_in_isaidub.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/31245248424.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/dimugawub.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/xefokamepix.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/no-nonsense_buddhism_for_beginners_review.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_off00010ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 5076 bytes
SHA-256: e5e017b8899eba4611fced189bc1b61d4395bf796dd7ea5ba472b718701d5fa5
font_01_sfnt_off00012148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 11240 bytes
SHA-256: 972a5fedce821abf7bd1977136add31bccccb2927bf88985e5a706caaaf84d99
font_02_sfnt_off00014779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14779 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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