Malicious PDF — malware analysis report

Static analysis result for SHA-256 c590bcafcbbe8e85…

MALICIOUS

PDF

73.1 KB Created: 2021-04-12 02:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77eea54be69be470b79b4c699f29442d SHA-1: 54a812a41d67d2c4d334dec10cc636cf58628c5a SHA-256: c590bcafcbbe8e855213cb7f0bfc9ca2d742428cfc4f1ac913191d616bbe07b5
126 Risk Score

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 0.9998

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
  • 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://mezovuduw.ru/strik?utm_term=para+que+sirve+magnesium+oxide+500+mg PDF link annotation
    • http://febiterozoz.medianewsonline.com/introduction_to_mathematics_download.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/7ob7VuK/vexed_in_a_sentence_adjective.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/favirab.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/gjihgiS/jofemagotimi.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/french_to_english_translation_exercises_with_answers.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/office_ergonomics_book.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/bhdiBgg/dirinabaposesakesi.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/262540.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/bangla_word_typing_keyboard.pdfIn PDF document text
    • http://zoxenejuwu.iblogger.org/antrenmanlarla_matematik_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lubuzasoxevixan.epizy.com/facebook_dark_mode_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/dota_2_auto_chess_economy_guide.pdfIn PDF document text
    • http://bogetezapore.rf.gd/mexim.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/tewarunebut.pdfIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_eb72daa92f8d41ce84c946a56c49a5e1.pdf?index=trueIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_1aaa97bd3e4c43148ad43abca105d597.pdf?index=trueIn PDF document text
    • http://bosadubarelazu.rf.gd/3493873419.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/94754216213.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5632 bytes
SHA-256: 16edbb669db97e09e04083036318c7719f2258556febd10dc64c13382b4f842d
font_01_sfnt_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 11444 bytes
SHA-256: db6f5f175ed937ef6a25a4e456f80d6ad633a572d499c85cdb21aa0c9b58f5d9

Open this report in the interactive analyzer, or submit your own file for analysis.