Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ac111cf8e0db38…

MALICIOUS

PDF

45.1 KB Created: 2020-10-26 20:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: cd890e82b303112320a7d034c545ba39 SHA-1: e10b1975083db8334b94cd93057ff8a8b8605622 SHA-256: 52ac111cf8e0db380de8a09d62464e9dd2b8351c7a555d2d80894d00c49858e1
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://ttraff.link/123?keyword=apsa+conference+2020+pediatric+surgery In PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/8f6e469f6557.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fc74d9089574.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/161732.pdfIn PDF document text
    • https://fuxuwalanad.weebly.com/uploads/1/3/4/4/134487417/70299a.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/vevujute-dodemirazu-porilaf-gusovimavibik.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/2fa9ac50.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/dukojaligezelewir.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/3602458.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/6090789.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/mubanudolazenud_lilugosesuje.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/jufupiwesikumi_lomemijepatok.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/b6d280f7bd71cbc.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/208737.pdfIn PDF document text
    • https://buritovetozew.weebly.com/uploads/1/3/4/4/134486370/negutewatafex.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/6244178.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006bc2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006bc2.bin)
    • https://uploads.strikinglycdn.com/files/ac190aee-359c-4d8c-8eda-120cafa40399/devious_people_clothing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0c0858-6136-4feb-b84d-f5279c0914e3/pefewidebatilojuvituv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf63a21-0f5e-4f5a-a7e5-820acb9825f5/31428955911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503964a2-fa6e-47b9-865b-020e66e83863/astm_b633_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d034e0b-a8c4-43f2-9777-b9c88eeaf075/watch_doctor_who_season_8_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc694f4-bbd8-40cf-9c9d-2e3ba89c31f4/como_elaborar_un_trptico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c10ddce-a115-4ccd-a350-d057fe4d34be/rufawujinulisegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bb3d35-e231-4c8e-a29c-45761c31b441/256916723.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 extracted file (font_00_sfnt_off00006bc2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 5656 bytes
SHA-256: a9ecb1dadaeb73026d7c58a666ffe2d9f27ca898a546fdf6078e5a2c461af14d
font_01_sfnt_off00007f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 11932 bytes
SHA-256: 9e06b8672a0bc067cac7b37f420818ca9101eca88dedc902d5f5ff0e5be633bb