Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2dfc7ae6551a4e…

MALICIOUS

PDF

45.3 KB Created: 2020-11-07 02:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: eda16a359c6d4ab4325a2bfd6740e367 SHA-1: cadb2f5460ea2c6eaa4043bf84066da3e5a8e80b SHA-256: bf2dfc7ae6551a4e163820c3fa8b58295cb3a064aed3f41d4aed5b4d82914c17
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=eeventmanager+seiko+epson PDF link annotation
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/dinakozipe-sosupidop.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/vazup-lewufonakozawev.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/4097595.pdfIn PDF document text
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/9267852.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://s3.amazonaws.com/risisipajole/chilton_s_repair_manuals_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/salabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e51693-867b-42ef-9a99-a3335b5ce3df/59350842540.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/ziwujaloxusodag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a035c9b-a9ac-41f4-bc5e-6a720df78885/getaduseremet.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://gizibutabob.files.wordpress.com/2020/11/38274121116.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_off0000643e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 4976 bytes
SHA-256: d85ea43a1853df1a68bc00ca486181c7e0da1c2722a01383978abc9b1a03c2a1
font_01_sfnt_off00007514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 11052 bytes
SHA-256: 306150dcbd78c99611e9987ee3cc757cb93c01707250e01163b025ae780b79b8
font_02_sfnt_off00009ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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