Malicious PDF — malware analysis report

Static analysis result for SHA-256 269f1f379f7d2e05…

MALICIOUS

PDF

79.2 KB Created: 2021-03-30 08:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4e52cc49e6636daad7b6145a7a308a6 SHA-1: 6fd132c2060149fa32e6c8a6f954f1feda2ba42c SHA-256: 269f1f379f7d2e05fd8e95635aabd48c9249b5b5c0332b32bff35a8e3e12713d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The PDF contains numerous embedded URLs, with a primary external URI pointing to 'https://maypoin.ru/award?keyword=auditoria+fiscal+e+tributaria+pdf', suggesting a lure to a malicious site. The document's structure and the presence of many links indicate it functions as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=auditoria+fiscal+e+tributaria+pdf PDF link annotation
    • https://cdn.sqhk.co/jisokemefaz/1ihhfhc/spelling_and_grammar_check_free_download.pdfIn PDF document text
    • https://xikofekukinakij.weebly.com/uploads/1/3/2/6/132681309/6589462.pdfIn PDF document text
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/sogozigifus-tosimeni-tigaxaru-wapulem.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/iplSghU/pumutado.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/93845711285.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/angulos_inscritos_y_semiinscritos_en_una_circunferencia_ejercicios.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/DKIheaA/nudapugajefobefevitoxe.pdfIn PDF document text
    • http://fakutuzogazu.sportsontheweb.net/possessive_adjective_vs_possessive_pronoun_exercises.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/4249581.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/masiwisaxizowisawav.pdfIn PDF document text
    • http://ravasixojodari.mygamesonline.org/math_symbols_in_english.pdfIn PDF document text
    • http://wenamifub.22web.org/walezinizukowele.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://uploads.strikinglycdn.com/files/683d872d-8c9e-418b-84c8-127494123571/ditawixigugoposulot.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/ruxelasotukejojame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7078df-ee8a-46d8-8641-afdf7b5d9bb3/you_are_holy_christ_for_the_nations_lyrics_and_chords.pdfIn PDF document text
    • http://pibesavifa.epizy.com/moen_banbury_kitchen_faucet_parts_diagram.pdfIn PDF document text
    • http://gubadif.myartsonline.com/sabumapaxufimipikena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722cf2e5-cfc9-4145-8945-95d12c14b669/marlin_60_ss_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6233eabc-6fe1-4ad9-bad4-e08021abb4a0/3099714251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f53085-9f11-4035-bd90-238fdccd26f3/63806130104.pdfIn PDF document text
    • http://roxonolabixatox.epizy.com/41768794742.pdfIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/duke_s_anesthesia_secrets.pdfIn PDF document text
    • http://vefagukolile.epizy.com/27137998063.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/dewufiwe.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/18219800309.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5052 bytes
SHA-256: c1f3e5abe7fbf9d5acec60ab41073097db4d813971aad6b4909083be6b0743fd
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 12824 bytes
SHA-256: 4cbcd3ab6251dd76f8b3bd8d80b67f135fba0c07795f3375970d5f229224dfb2
font_02_sfnt_off00011f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F53 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176