Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc61633ca1f7355…

MALICIOUS

PDF

232.6 KB Created: 2020-10-30 15:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 37e4e357b13265ebab9792c4cc1de58a SHA-1: 9bb5792014aa8eb72513a8d6fcfb33e8ec33c39e SHA-256: 6fc61633ca1f735538a03b605deee854f7535c4f10b8a5ff15f915e1778911ad
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 0.9998

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/aws?keyword=chemical+bonding+quiz+answer+key In PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5351011.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/gojavet_pagamip.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/cf2fcfd0-176e-4448-a1bb-3d998fab5758/seluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bf3627-0894-4a76-b5b6-60dded95fc13/tufaduwafit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b6f7bd-92f1-491b-81ce-e077be6340a5/bewavosevad.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/bargain_news_ct_trucks.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gugumidonawasanufeguzuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dfe7b0-6ae6-465d-8273-d094f91f6e22/xonumoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115ee3f1-0d20-4919-85a3-5ce268d96f0f/16609245959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1566/7353/files/ucas_reference_letter_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/nursing_diagnosis_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6ddc19-1079-455d-b4db-0c49b2255273/fundamentals_of_vehicle_dynamics_gil.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/42196948779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/carb_guidelines_for_type_2_diabetes.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/lorularojibelimidemilo.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_off00034ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34ADE 5832 bytes
SHA-256: 9798a0c28d1217f715726d94bf12487560ddffc7a9af047fb1ac0b0f81f05bb3
font_01_sfnt_off00035e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E94 22204 bytes
SHA-256: 6f48a672706f408a798d53f21af05d50486dc61a8e04a271be2c1306b82eb936

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