Malicious PDF — malware analysis report

Static analysis result for SHA-256 e031f6199fd59bcb…

MALICIOUS

PDF

33.9 KB Created: 2020-11-09 16:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5448626ce5a42c818a0b68e8bcff207c SHA-1: d5c273830118911b9b73fc4eb9040d60e77c60c9 SHA-256: e031f6199fd59bcb506c8551c4d03623c8d84ba31959930f8d51ad52719a8765
94 Risk Score

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/strik?keyword=percent+error+worksheet+with+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f9af62912bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5f9b536141bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5fa0aa4337473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f876cda457bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc721f24-e073-4c31-984a-bc4a0313262c/21949330145.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/when_is_eid_in_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc247f3-a8ec-4e90-bce1-94875614d30e/fikigudodoretejezosifeba.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/2019_calendar_india_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffbba7c-8343-4a07-aaef-88c36a20872c/gathermate2_herb_nodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b663a3-0a5c-4c23-ae3e-7aa06a499aa6/53212450186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843150ac-6443-4227-a875-be6aa4fdb695/algebra_age_word_problems_with_answe.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/skyrim_special_edition_requiem.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_off000048b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B5 5116 bytes
SHA-256: ffafb31eade03ca098d85557f8bd0acc437cf1033d20e42fcf183ecee7edebf4
font_01_sfnt_off00005a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A31 9568 bytes
SHA-256: d763ace502a4a821e31da76f2c3dd7c563be31b2202cb61fb648f320ed89c89c