Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eb85039311f168…

MALICIOUS

PDF

75.4 KB Created: 2021-04-03 10:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9894c74f8c6f89eb9a987bd9c5786bf2 SHA-1: ed36917191355db6408a50ebcb696d1890c2c701 SHA-256: 76eb85039311f168eac7d9604c2b987147aea7bb5218511a69da14b7a9c7e459
156 Risk Score

Malware Insights

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

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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/wix?keyword=sonic+forces+mod+apk+2.19.1 PDF link annotation
    • https://dugixezixek.weebly.com/uploads/1/3/4/3/134344389/1967674.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/greek_mythology_books_to_read.pdfIn PDF document text
    • http://wawovotem.22web.org/cattle_guard_forms_for_sale.pdfIn PDF document text
    • https://sixofufi.weebly.com/uploads/1/3/4/3/134375841/nurivatibal.pdfIn PDF document text
    • http://kipiluzebeguluj.iblogger.org/free_english_grammar_book_level_4.pdfIn PDF document text
    • https://letolikasepa.weebly.com/uploads/1/3/4/6/134625664/vajuxufavuvese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/xifix.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/lamusomukumup.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/treatment_of_hemophilia_a_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/english_grammar_worksheet_for_grade_5.pdfIn PDF document text
    • http://fabonek.rf.gd/cinematic_action_music_free.pdfIn PDF document text
    • http://tuxefefili.epizy.com/xapijav.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/22479024502.pdfIn PDF document text
    • http://vesuduw.epizy.com/afasia_de_conduccion.pdfIn PDF document text
    • http://poxemibusap.epizy.com/simplicity_regent_lawn_tractor_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/manuale_tissot_t_touch_expert.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/mixuvad.pdfIn PDF document text
    • http://zesexabipezu.epizy.com/kukafixogaloguneg.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/59043945900.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/subik.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_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 5808 bytes
SHA-256: c4036785ae2153c8b0aeb196ab317be32b5454996411ce82fcfde846df14e0aa
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 11536 bytes
SHA-256: 24392d72dc72af4154bb658500395964e1a6c85e8147c491f13e4dfdb8566203

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