Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2b085b87008bfe…

MALICIOUS

PDF

41.8 KB Created: 2020-11-02 04:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2c8a04663c0796e6058d9cd919226e2d SHA-1: 9cc186a84a2b6779e9a3aac60d54bd94b62e3eb9 SHA-256: 6c2b085b87008bfe15b10b0d951a09920f9e653abe0bb129fdeee0a494840cd2
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://ggtraff.ru/aws?keyword=examples+of+fractions+used+in+everyday+life In PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/1271594.pdfIn PDF document text
    • https://nipibodofabujid.weebly.com/uploads/1/3/4/2/134265940/silup-tasirifid.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/xaxukikebimetewuv.pdfIn PDF document text
    • https://nugaridepi.weebly.com/uploads/1/3/4/4/134474671/7613842.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/kiremupis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_5f9c41b174cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8a87d2eab96.pdfIn PDF document text
    • https://lugoponogib.weebly.com/uploads/1/3/4/4/134404253/dizeritalegigaku.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/7cee89a4-76d0-403a-be8c-9b8889b0a658/nifufagenifonunizo.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/the_apple_1980_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/impact_of_branding_on_consumer_buying_behaviour_research_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/38642737433.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_off0000630d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5488 bytes
SHA-256: a20c6e544d0261aad8f8f71614f8dcd4e734bed965e8130ff558cefe787b7555
font_01_sfnt_off000075b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10676 bytes
SHA-256: c64614f2fb1dc953da8a35f3c5c2832dfc2c92ecc16dc9cd43aa6166a8d28715