Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ab33cda44a3d81…

MALICIOUS

PDF

49.8 KB Created: 2020-11-07 22:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 214a9b64705d3af968bb9980a3ef414b SHA-1: 4b4c147262db5a2f4f18b2fb9f4e38fc1251b157 SHA-256: f1ab33cda44a3d81062f146d76ae9e1c8bdbd3c4644f27a91296ff98f9aa58b7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?keyword=graphing+parabola+from+vertex+form+worksheet In PDF document text
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/3903171.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/wesivelanirufes_wojuxigo_muvoni.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://nekonenos.files.wordpress.com/2020/11/the_purple_book_biblical_foundations.pdfIn PDF document text
    • https://gajezadirom.files.wordpress.com/2020/11/wafagigigaz.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/potokudowajipube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1feeb00f-dae9-4019-83ca-e3a2e37c8b1e/59686656884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b84a3e-fe55-4f30-b8ca-ff7358af1c15/human_body_an_orientation.pdfIn PDF document text
    • https://jizobote.files.wordpress.com/2020/11/phase_3_phonics_letters_and_sounds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f4f498-9ad8-44a8-85cc-478257b58749/96531426257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797d4bec-8910-4cb0-9338-7bc09351e655/reralige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc252a2-1b1d-46a5-bf63-6a983b33718d/90420977817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f30e10-ef9e-4fab-b68e-fde9c175b0d5/easy_electronics_kit.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_off00006821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 5560 bytes
SHA-256: 5ecc90a6992fd69cfa3be4d8ff5bda48d11ae8f5756b17bc8fa248b551a59b85
font_01_sfnt_off00007aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEE 14732 bytes
SHA-256: ce0dbd6cc06869346cbb5d5e0c622b7d11730625be4d8a21ed0df1290a0a03b9
font_02_sfnt_off0000a970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA970 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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