Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafa044adee5e670…

MALICIOUS

PDF

42.7 KB Created: 2020-11-05 02:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 99ba43f7473d5dbd7c2c8772680ecd3a SHA-1: 3bbef3240f7e79240ee9b9d9717b57759f9fb8bc SHA-256: bafa044adee5e670d5a4bfa84d8c402d6b22ee033a5da26858b018bec32b2126
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://ttraff.me/123?keyword=castle+clash+hacks+no+surveys In PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/foxofuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f9ff0c29b89c.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/1463696.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/wenebumafepa_jefop_lefatijozeti.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/2e2fe1b7.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/4104413.pdfIn PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/3030611.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/406b1f8c-1e1f-4a7a-8553-fa95a4ebe622/10228718698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ed606f-734c-46fc-8d97-73f695d18db2/wyse_cx0_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e20ecd1-c182-4b8f-b459-d39b9fa61612/sikovugodilepoxafitasutox.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/86392661161.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/51942629782.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_off0000678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 5020 bytes
SHA-256: 23031cf4784fd53cae70572c1d6c1284aa086d7898b212523b4a910819fc9c44
font_01_sfnt_off000078a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 11060 bytes
SHA-256: 12bf4902bd66ce3ef5d7fa76307806b763598217ed7ba3bfb8b0882c413fc7e3

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