Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad336bbc5644b73…

MALICIOUS

PDF

43.8 KB Created: 2020-11-05 08:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6796ae25494fbe9137b0a82da59a843 SHA-1: 11873d75b7f87caa3d636a9b419403dc14442466 SHA-256: 2ad336bbc5644b736122ef1ebcae10c6672bc29894f2ca1bd110c8b821b77a87
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses an invoice-themed lure. 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 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/aws?keyword=3+day+notice+ohio+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f90cf2c69efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_5fa37010f4128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5f979f91e87c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f875af4e5840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8e5489ad64d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_5f9b1e25299ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f910ef096f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_5f96408602663.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/rowubunak/stardew_valley_oak_tree_spacing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1a1487-cf04-4227-911f-ab87eef05786/megadimension_neptunia_vii_true_endi.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/com_zombies_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/34691104543.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/92444395473.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/30382059064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523e3b2b-f2b3-4076-aadf-0ac52fde1103/hotmail.com_login_email_sign_in_hotmail.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5000 bytes
SHA-256: 264240407d972d8beba567460334cde6fc4c49086401b60f908f5868b6b2c737
font_01_sfnt_off000071b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 10156 bytes
SHA-256: 894e82e62d7b5b4fbd89118d5180cbbd147e8500aff6d71aa4678824eca2c30c
font_02_sfnt_off00009447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9447 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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