Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59b5ddeb59ef730…

MALICIOUS

PDF

76.9 KB Created: 2021-03-08 15:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 01793837f16183424ce4e44c6f7122d9 SHA-1: 42f91e980317889147a8258394d5be66d6691097 SHA-256: b59b5ddeb59ef730baee509efebdb194d41c34755b7c0c8577fd8c8aa9eafc21
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to a medical handbook, likely to trick the user into downloading a malicious payload from the provided URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=handbook+of+the+cerebellum+and+cerebellar+disorders+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5ff25628217ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6027678cec2da.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/73223828783.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/nationalism_in_india_by_tagore_wikipedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5ff676fc1d9d6.pdfIn PDF document text
    • http://tumbaa.space/is_primerica_insurance_legitrt9yx.pdfIn PDF document text
    • http://esmoney.site/22848801809orlcj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_6043efe04f6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_602ebf0154500.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/jenisozazewubo/kagejusexanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce20d85-a9bc-4374-9195-039da661ca64/zokadaxugakerorusira.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/achondroplasia_dwarfism.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/spiderman_speech_meme_template.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/habitat_organic_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/atto_tag_bangla_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/tafasagawon.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/where_is_our_lady_of_the_lake_college.pdfIn PDF document text
    • http://vabanenutulaki.rf.gd/all_androids_dbz_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5030ef-c5b8-4685-a722-2797d360a6d1/what_book_came_after_flowers_in_the_attic.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/tom_clancy_rainbow_six_siege_review.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_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 5560 bytes
SHA-256: 4e56fbac4bb4b13ea8d7cdac601af0e7ef810eab455bfad3614dac56edb1ac59
font_01_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10092 bytes
SHA-256: 8769689a35438819d2865749e56410fc7ebc29d228b3fee9ad3e1a038f75ce5f

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