Malicious PDF — malware analysis report

Static analysis result for SHA-256 228b751fe974b093…

MALICIOUS

PDF

73.2 KB Created: 2021-04-03 12:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3be95401da06c0c8a23c3c6135db72e2 SHA-1: e89d7743861a4f8d22ad7b248b2f1d9f674514a1 SHA-256: 228b751fe974b093d5d1d1753ec3b6157bf909147b9cb683840c80da5d4cdfa2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to disposable hosting or known redirectors, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, appears to contain product information, likely as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=tp-link+wpa4220+wifi+powerline+adapter+kit+-+av600+twin+pack+argos In PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/zupawog.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/8918a11d591614.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/tokyo_ghoul_re_manga_anime_differences.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/hnCjIja/93677422130.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/3119916.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/BgdtgeW/74475444954.pdfIn PDF document text
    • http://riragukigud.scienceontheweb.net/vesemevuteferawuni.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/putiwonejifujodudogigiz.pdfIn PDF document text
    • https://babewepuk.weebly.com/uploads/1/3/4/3/134311046/4dc914.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/navy_seals_training_base_san_diego.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/alita_battle_angel_part_2_full_movie_in_hindi_download_filmywap.pdfIn PDF document text
    • https://kivifakan.weebly.com/uploads/1/3/4/8/134870172/8f925.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/kuzofipeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vovivufevalo.rf.gd/toxad.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/derecho_internacional_en_los_actos_de_comercio.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/18837864883.pdfIn PDF document text
    • http://dalefiza.rf.gd/92775465002.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/85113011402.pdfIn PDF document text
    • http://tumofif.rf.gd/emulator_gameboy_android.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_off0000dce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE7 6036 bytes
SHA-256: bdd2f4afa7d63cd689951b111e837364d9f57724b2ec07c6f18f032d18f6ddab
font_01_sfnt_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 11096 bytes
SHA-256: 6bc8f21d976d8f9c606aa300a1aafe75d52f3d066d296796555549256c84c8a9

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