Malicious PDF — malware analysis report

Static analysis result for SHA-256 37704b3061267d30…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 09:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 01489ec60f2445cebd0a8cf0228d91ea SHA-1: 42854592f51b79dccd5c4c6dace0a8b74ca7c4a0 SHA-256: 37704b3061267d30139d095f5b5658da68ccc42c3387a1eddcea72456c00b326
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a PDF download, reinforcing the phishing lure.

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://bologen.ru/wix?keyword=shadows+in+flight+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fd08487bd572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_600f74b241e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421476/normal_5fff5abe15a46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_5fee302473609.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/hcc8jfs/tisomuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482216/normal_60126062b5ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_6027d6eace0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_6026a2eb001f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467027/normal_5fcff6c694132.pdfIn PDF document text
    • http://goxakawelapa.22web.org/balenciaga_mens_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/ghLhaij/52602238069.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/dosipive/la_biblia_hablada_reina_valera_1960_mateo.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/belunorusuwikawagitirete.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/all_india_airport_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/zoxigofuwijiwivotipefijaj.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/name_labels_for_school_books_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/big_lots_twin_bed_sheets.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_off0000e0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AB 5400 bytes
SHA-256: 22ccf9c1fdcf2046ae24388c1811266f86abf592bca64170def2e8d9646c821f
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 10144 bytes
SHA-256: 2749aaffbb36350aa82d3b7d98f574614da631d15fff5d5330185a48240ac4e3

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