Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbbe932c3487542…

MALICIOUS

PDF

67.2 KB Created: 2020-12-19 12:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9adcb9c9e6ba0d0121f476e38898c824 SHA-1: 12a6d2e0cf3c4e0b0a3dcb07f4c0c2af575ba9fe SHA-256: 5cbbe932c348754207e080c8fe216141e37d102a5905db9832499a3a7ae87993
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=kenneth+wuest+ephesians+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5fc2c88420285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fcf4f0519f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fa19f588e41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_5fa4993fced1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8f6d3844c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f9ce3219bdce.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/kavitokolezub/86255877214.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5559ebd14ff0dd2ba110b/t/5fcca618e43f2b00a8a3e5ba/1607247385142/zegilozegoba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cb0188c99b6d37c032fb/t/5fc9e8d64e3f3d25173f0ab9/1607067864528/ice_age_adventures_cheats_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/fadudesevu.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/novena_prayer_for_the_dead_9_days_tagalog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57c39a3bf4b14abc81ab8/t/5fcf7a0457846c5b8357f437/1607432711709/word_crush_game_1_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc3c906173fb5383b16ed51/1606666504932/panasonic_sound_bar_sc-htb70.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ee5bd14ff0dd2b76208/t/5fd18da487bef85997e76390/1607568804985/coda_meetings_san_diego.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_off0000c816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC816 5060 bytes
SHA-256: 2cd986e70946d9c43e219565c427c199aefc7ab01ff31cbf22923d873f1e987b
font_01_sfnt_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 11472 bytes
SHA-256: e8efa03d6e4a1308a4feabeab1aaa99eb0d02fec8bcbc0b3a17b3b8a06b0f0d9

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