Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77da4942d36e13c…

MALICIOUS

PDF

71.3 KB Created: 2021-02-23 11:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 28d0b4bde5ca0519a0cf4b3bc8edf5b6 SHA-1: d34f84b35b90f5da270029a52a3bb072a204f6fb SHA-256: d77da4942d36e13c4740a91c6ed8e3ee99e2709373e1eb2ebbc8a961491353ae
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/123?utm_term=the+crown+on+your+head+board+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366969/normal_601ba54ca97a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386349/normal_6004ba6411ec5.pdfIn PDF document text
    • http://sudiwemubitep.22web.org/factoring_worksheet_a_greater_than_1.pdfIn PDF document text
    • http://lukosewikaj.22web.org/how_to_adjust_skates.pdfIn PDF document text
    • https://pevolevu.weebly.com/uploads/1/3/1/6/131606362/2104619.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/DQgdcge/police_vs_gangsters.pdfIn PDF document text
    • http://jarobadut.22web.org/tesijunadupij.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/i72k3VF/82040305409.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/WkKhdjj/archery_shops_in_michigan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banugigo.epizy.com/great_answer_to_what_are_your_weaknesses.pdfIn PDF document text
    • http://wugezirux.epizy.com/dofabonarebofijolitigi.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/letter_of_intent_residency_example_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/kagan_active_learning_strategies.pdfIn PDF document text
    • http://fofifalog.rf.gd/how_is_pragmatism_applied_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/refulapodiberalas.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/6578180806.pdfIn PDF document text
    • http://ponuruv.rf.gd/dubakedabevefez.pdfIn PDF document text
    • http://jipuzekas.rf.gd/carya_cordiformis_uk.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_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 5164 bytes
SHA-256: 122c8bca2339041c088c7e6404c972f4518797fd8719effda34841bbb3cbc30c
font_01_sfnt_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 10768 bytes
SHA-256: 3e78f952ce2838fe2b2a745cf2eeeaca1130cc6161e3869e01a16cf94286ae81