Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1992eb90717d80…

MALICIOUS

PDF

38.8 KB Created: 2020-11-08 10:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2b92584cf8545a170b1486ac1d253e31 SHA-1: 4b792436b4164784ccdef0cb8495bf73245f4cbc SHA-256: aa1992eb90717d80bff2ce95d3ffeb84bc7ec8a9e53138a77de8edfc8907cfe9
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/wb?keyword=mrs%202020%20spring%20meeting In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/6306106.pdfIn PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/a31a55c7c45a18.pdfIn PDF document text
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/5840979.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/vakiwusi_zerarupuzapesu_zuxorivikabedok.pdfIn PDF document text
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/gifatiwunidanoge.pdfIn PDF document text
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/727457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f9135191e916.pdfIn PDF document text
    • https://devusabuzanuwuz.weebly.com/uploads/1/3/4/3/134352374/vanoziropilawokumowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f9510af41279.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/waxawitifevizu.pdfIn PDF document text
    • https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/9118886.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/1b131ccf-9593-4d41-b5d7-91bd147dcb50/summary_of_chapter_14_of_the_hunger_games.pdfIn PDF document text
    • https://pavokido.files.wordpress.com/2020/11/video_downloadhelper_firefox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f35c2f-3a5e-4e2b-a169-691c75a9d3cd/vopog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d2abaf-0788-4445-88e9-27b512ce8cdd/hp_mobile_data_protection_sensor_driver_windows_10.pdfIn PDF document text
    • https://fiwanawid.files.wordpress.com/2020/11/pioneer_vsx_932_review.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_off00005925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5925 5176 bytes
SHA-256: f07e7d8266ff7dffb5f5d4b7811d6b40985f5cfbfe2c6d9aad701b3c1bd28301
font_01_sfnt_off00006abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABC 10472 bytes
SHA-256: 0fafae6e7d0e19bb26f52c340b72bcb521d38cf3d70228d8411d2fb2015fd2aa

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