Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22dc30a885db470…

MALICIOUS

PDF

78.0 KB Created: 2021-06-02 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d181e02e63f7de0ff94efe8d44a0a8b1 SHA-1: daeaad468204fde1ec754bf44740e4ed696b5aa3 SHA-256: b22dc30a885db47003c7edddf9aabf972d39f36a8d3cd5717441fbfcebadf722
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=book++free+website PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5ff8d8de13a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473031/normal_5ff6684d47246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_605198fa8c955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_6021c5e8a194d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_605c5e0c58734.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevosezew.pbworks.com/f/relanemodova.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/jack_and_the_beanstalk_book.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420660/antes_que_anochezca_pelicula_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5664f3b4-c49b-4552-aec1-e694807c895f/vamemob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39dfa8f-ac8e-4529-8ab5-6e5c9ec28c60/how_to_determine_aql_sample_size.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144416061/najevamulevofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3487341-8416-4a9d-afed-d55f16325ff8/bukumobowapopabuzopabi.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144435420/tebavokijip.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/zoriwewisivodiveki.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144460065/86121444395.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144445278/vince_kath_and_james_full_movie_online.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/descargar_mods_para_street_legal_racing_redline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5cdd34-42bc-4141-a6f7-033457864010/what_is_the_meaning_of_a_red_spider_lily.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144417717/cabrio_washer_error_codes_f5_e3.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/classification_of_words_in_english_language.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/how_to_take_child_lock_off_bosch_oven.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144469410/botepuwilaxazomusapivetew.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144480513/32162592540.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_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 4864 bytes
SHA-256: 96f1f4c2b3df2ff1152bcc749b31667194bf7b3371289bf724f77b2c22e633ef
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 10640 bytes
SHA-256: 7b17d1359044e39f25bdef2687c978c68f6c253479b8466690bcd7bb336d8a61

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