Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50c832fcb9ecf5d…

MALICIOUS

PDF

43.7 KB Created: 2020-10-31 12:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e1416d51b2501910a3acbbbed969227 SHA-1: 2544508a231ccdd5afe94b7b19e90ae7f033abbe SHA-256: b50c832fcb9ecf5d9a56755b819775e06c568a96ff88cf4fa0021e909e7ad2a3
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/aws?keyword=casio+g+shock+5146+instruction+manual In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f870264cd2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f8ebbd81993a.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/8823596.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/wonoti/alfred_adler_birth_order.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/need_for_speed_most_wanted_money_cheat_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/72975128224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b98cd28-2d36-43df-8a5a-e423944ebffb/zigowijawovejalodi.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/samapumadodegeripod.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/boxing_weight_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a921bf-94c4-4982-9c09-dd6778288723/82445330438.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_off00006a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5D 5600 bytes
SHA-256: 5b7070df42618af15ebcb7365c29b163cb8c4c7019fb5ae0bd883b67d2c5562a
font_01_sfnt_off00007d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 10760 bytes
SHA-256: e699465b5f146e52bcf8b9f7b1fe785e1f78f8c07d32c0caf00acd1acf1c665b

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