Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1826a878f85678e…

MALICIOUS

PDF

51.0 KB Created: 2020-10-27 08:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4d08c0bae219971b631a46fef6650591 SHA-1: 28074d997671dea69ac168050db01ce11083fa2d SHA-256: a1826a878f85678e4842c96af618084207548cffb71ab7c465c7b7166bab39cb
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://ttraff.cc/pify?keyword=skeletal+system+worksheet+answers+matching+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424037/normal_5f9786a259c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f93a88830c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f92c272f2fd8.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/fb6db8209d1.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/6470528.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/4967626.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/tabuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f90382b83cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f8c038595412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5f9599939a29b.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/wunupalezozerud/brian_weiss_los_milagros_existen_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/6390462861.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/8667774671.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/broken_glass_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d1346d-01c4-4ce5-b9a5-4ea03fc890b5/29798164454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46485499-bd38-40b3-a765-559d825640fa/dovowogotenubafugezabuwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc02e48-e42b-495d-a62e-ce6114668498/guide_to_the_project_management_body_of_knowledge_pmbok_guide_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3704d41d-c6a0-424f-89fd-d2706542209c/nedisiratowozodut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f972662-322f-4eeb-a17e-82a37adc7cb7/tajajawakazuzup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bebdcf-f4ca-46f9-a69c-d6a88baeb658/17849853590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1d81b2-ae72-4836-9852-25ec77030479/wurst_minecraft_1.14.3.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8659 5708 bytes
SHA-256: 210940c575a69c05e52c79f4dc7a9b149f45e29dc03ba4104b62919fe7b2701b
font_01_sfnt_off000099b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B3 10652 bytes
SHA-256: f0bc24d070cca294890415b456ed07370d5f71e9bd1b9fd75cc66b0655e885be

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