Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7386fe023467af7…

MALICIOUS

PDF

81.1 KB Created: 2021-02-21 02:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d50d523d10b58ff36ce9442433b4e853 SHA-1: 1a7c5e87d07648896ca95d6bfebcd27538885feb SHA-256: c7386fe023467af7a4665b16205b231ca0658ab0ffcff087a613d7f15a785298
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a book summary.

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://druttle.ru/strik?utm_term=libro+del+secreto+resumen PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5ff7c3224df48.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/jfgjtid/78055060420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fedf9947305c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_6031591a137a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_601a07233270f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ffcadd04caf1.pdfIn PDF document text
    • https://cdn.sqhk.co/fosikikevo/jjjjQhe/83732768036.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/iiBjcge/grand_gangster_3d_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_6022bea052a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_6014571c7f0ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5fcba239d4b4f.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/d14012329d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/loxopudizus/most_dangerous_game_definitions_matching_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/bronchopneumonia_in_pediatrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/bstc_2018_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/kigikefaruguge.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/malaguena_piano_sheet_music_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 4840 bytes
SHA-256: 61c387a2bd05b00eff66846a3f4d21156b8c43011096d4f2f5e0b50b3341959a
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 11160 bytes
SHA-256: f9a82cdb4cae47f6f9a9527bc116f1cd58155fcc51e2c8d0206c32a6bf3915fa
font_02_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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