Malicious PDF — malware analysis report

Static analysis result for SHA-256 6392158de5c7f1f3…

MALICIOUS

PDF

37.8 KB Created: 2020-11-09 09:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6757150beae5849f24a6abf9a822e3c7 SHA-1: 971307e2534f3d1e332623e5bfa4516a4eb62f8e SHA-256: 6392158de5c7f1f392e7a594e224260489ebc99b52eac6120c9a0ecf521aabda
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/aws?keyword=12+rules+for+life+pdf+download In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.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/jaburirarov/gta_5_apk_free_download_uptodown.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/69980491207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0704a9-058a-4fc0-8ed7-74771395dd8f/the_soul_of_caliban.pdfIn PDF document text
    • https://tukowonoko.files.wordpress.com/2020/11/17162342068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18ebf23-4684-42a3-b989-1a08136ea5e0/botopulunalofipazuru.pdfIn PDF document text
    • https://xatimetomax.files.wordpress.com/2020/11/nissan_720_manual.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://zuwegufu.files.wordpress.com/2020/11/xugopipaxunapenewote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5c4da0-2862-43ce-b298-5714171c8a02/94087792837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4362d25a-e240-4eed-83f1-8559673aaa5d/35196696644.pdfIn PDF document text
    • https://zapawex.files.wordpress.com/2020/11/93905542891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff32e48-e9f7-466c-927a-499e4c7fd4c3/69388895957.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/data_structures_and_algorithms_for_gate.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_off00004dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAD 5216 bytes
SHA-256: b5ed70c3bc1273ee77dbe94f6b56ee8ec714415c1b076b221614eb87e6c7537a
font_01_sfnt_off00005f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 13856 bytes
SHA-256: 2155d48290c3b5afcf441f86d06d439d4591518430b26b5bc088031fc68ec1f0

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