Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0d3c28acefb8fb…

MALICIOUS

PDF

36.7 KB Created: 2020-10-09 18:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 29c8ce24922ba3890b34442335687d57 SHA-1: 06e646fe8a7139de2a4d44a47666742fa9be39fa SHA-256: 5b0d3c28acefb8fb43dd3ce99ae67a11cc760ada4aefb41a2f31905512c1afdf
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 0.9999

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/strik?keyword=the+medicine+bag+comprehension+questions In PDF document text
    • https://site-1039303.mozfiles.com/files/1039303/razufozufuxamezasogoraraw.pdfIn PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/rataxevivalamaruzewejuw.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/51363466748.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/88068605818.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/nekafevi.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/60419134753.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://uploads.strikinglycdn.com/files/8de3a98c-b990-44d8-ad85-90af35e1039d/fumevafajerodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35abd9e0-63bc-4172-9725-2f170632b15a/70337537682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997d8f54-003c-4056-bb89-0f1615a2ae26/gotamovuwujekiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c9fa39-fc16-47a3-bcbd-85207c70a5df/87062965881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a650845-0811-4399-b14d-70abe982b77e/36650390033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95a0d50-22e8-4189-8051-ff377e0f6a4b/vaxowepixipivubetub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0456e8fd-48bc-49ba-8a02-55550fb8f19a/murimerutixam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b25bab8-b38e-4da0-8bce-4c8c5d8fba32/66423276998.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/rightsIn 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_off000045ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45EF 5552 bytes
SHA-256: 1eaad0fd3c4aa59fc6b18f5941617859ef5605d268554a3dc277ed9769b35fc5
font_01_sfnt_off0000588e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588E 9468 bytes
SHA-256: be38ce7f9b05751a228f47b8de6e6aeb4df455c6ef7becc7ef1f7f42e11bdbdd
font_02_sfnt_off000078e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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