Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4912d8e261ea18d…

MALICIOUS

PDF

40.3 KB Created: 2020-11-05 23:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 542e9f08ca021431d8099625da7ea0ea SHA-1: d92003d0a4366449fc43ed354794c77d9a5f0623 SHA-256: a4912d8e261ea18d1b7dac1710c6b067eb738ffce45ff10e002918cf1f36a001
94 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 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 1.0000

Heuristics 3

  • 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/123?keyword=o11s+lyrics+ffxiv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f92da9f71c26.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/ligole/60612667427.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/minapalot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd93347-485c-40bf-adc6-d6c9c68db3e9/pufuragaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/10th_new_syllabus_english_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/lopressor_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/goxegapibutosimewedi.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/65473918264.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/90539826056.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/nuwokomorojivimukiseb.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/crazy_taxi_unblocked_weebly.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_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 4972 bytes
SHA-256: 3546943534c46b99970c188e3f8416d26a8d672e58ab7994a480971e70e9efa4
font_01_sfnt_off00007024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7024 10980 bytes
SHA-256: ee0e6c6455283a39b3c8f85a153a11de268b1cd5f7bb2c6218e7b37bbaafac51

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