Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25f2b66dc572e2c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 04:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 126e35743de9f70832c28ba8e6df1367 SHA-1: 7cc851a8c1547b21d6b15e60958371b4de27b38d SHA-256: b25f2b66dc572e2c230de729f2a1133a2934b667ce1450835e8bd63dd267d308
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'jottigo.ru' was extracted, suggesting a redirection to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are common for phishing lures.

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=pencil+drawing+easy+sketch+ideas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5fe45df6f1a3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fec54f7934b5.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/the_hiding_place_movie_2000_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_602a83582ea8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484154/normal_5fe5c5519887e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_6007e09d7a5f8.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/IzghNsn/scary_sound_effect_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/dmhjjie/wufub.pdfIn PDF document text
    • http://fodelogutejamit.getenjoyment.net/13932574344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_ea7f0c8256044d009f0296ad579b8884.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4734735-712a-4093-8edf-2fe7069b1c79/vijefamojumizubojuxiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50885e3-fa47-4baf-acd7-3e43ea73504b/25089917376.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/pakel.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/temufutosukirirenavudap.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/use_a_geometric_formula_to_evaluate_the_integral_calculator.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/why_is_water_leaking_from_the_bottom_of_my_lg_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f47af9-3127-4843-ab00-95c61e454b74/fawosibejobe.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_6c503e24f63e4cd6a240d8fb457c263f.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_56728d8f82154fb6b995710207957649.pdf?index=trueIn PDF document text
    • http://lipeporo.onlinewebshop.net/book_free_download_sites.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_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 5460 bytes
SHA-256: 1f9f86f06b3159f52f05ea96df8ce896e81eaee7dcf33df1f57045ae6be4403c
font_01_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 11288 bytes
SHA-256: d98bafba01ec14cca7ad75ecae7139de42c8e5753fa433726e8605d6b2ae2df5

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