Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf835d647bbf8aa3…

MALICIOUS

PDF

78.9 KB Created: 2021-04-07 09:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1634fff004ba6c7d67b05050ce541fd6 SHA-1: e1224c785278dbe498c923d770409d363fe88ad5 SHA-256: cf835d647bbf8aa334b1bd093f5306ae00cb5e53613a619387bb19cc24ee3579
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to trading strategies, aiming to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=trading+strategies+forex+chart PDF link annotation
    • http://ch-redirect.icu/compound_inequalities_worksheetvcqtd.pdfIn PDF document text
    • http://good-production18.site/galefazinirudovudapafoes9m4.pdfIn PDF document text
    • http://kind-insta.site/how_to_search_google_classroom_codec1uno.pdfIn PDF document text
    • http://copyrighthelpptteam.com/lutupibesetegukanuxugomextxhnu.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/79357178010.pdfIn PDF document text
    • http://clubstore.pro/coleman_inflatable_hot_tub_chemical_instructionst94ne.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/american_english_learning_book.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/apache_web_server_download.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/puretulenuza/berkshire_hathaway_annual_letter_to_shareholders_2019.pdfIn PDF document text
    • http://luvabuvozetusus.epizy.com/punjab_election_result_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/airnow_android_app.pdfIn PDF document text
    • http://xerevim.epizy.com/agric_science_for_primary_school.pdfIn PDF document text
    • http://neloronubu.epizy.com/kadufo.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/88630458130.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/kaba_simplex_1000.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/lenovo_t510_laptop_cost.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/16902066323.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/chess_fundamentals_capablanca_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/adobe_after_effect_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/sexavid.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_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 5268 bytes
SHA-256: 787dfddd3a18a9dfc780cd90ae317aa16324e6c5911e32df39022bbfc197e5a4
font_01_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 10968 bytes
SHA-256: 587b4ababf7bbee8d81d3f7e5168a79e1a0663fff8444d7e69f1db41a8ed7099

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