Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cf4b21905070d5…

MALICIOUS

PDF

44.6 KB Created: 2020-11-09 05:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31763dc4fa7d1ef2d13bae953cfc6aa9 SHA-1: 921af4d225ca8424cdfc4ae501288b0cbabb17e2 SHA-256: 53cf4b21905070d53fc7f46d2b0909739e1f1de7fc3a72b1764e8ca7a9f01b92
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://gettraff.ru/123?keyword=printer+queue+local+downlevel+document In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fa0bb474b879.pdfIn PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/nunir.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/paxukekabejodifewara.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/b55542c.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/bodajaku/32578752580.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/cambridge_checkpoint_science_teacher_s_resource_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/types_of_memory_episodic_procedural_semantic.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/bozume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943df94d-8d5a-41f0-9e12-2710c772da68/jokuwulepepazonejolemevu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/hotmail_email_configuration_settings.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_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 5184 bytes
SHA-256: 436d295a4205108ad0f52919a882b363e8390a157f36873223dd3f74d3e1b3ad
font_01_sfnt_off0000801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 10996 bytes
SHA-256: f42bcc22a3f73ba21be1c80ac25227b2dc8c4385bbe0ecb5d28d0b7c6534c126

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