Malicious PDF — malware analysis report

Static analysis result for SHA-256 5766b82e4772fd64…

MALICIOUS

PDF

47.3 KB Created: 2020-10-15 19:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d0e9d53fadcd23b16e24a58845861637 SHA-1: 61175c8bba682aa8fccae7b6e2901b9be53c6405 SHA-256: 5766b82e4772fd641526297dc9d238e8592fb383e2f0e28565be4f3fa79c4b71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for potentially malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=ugandan+knuckles+battle+royale+mod+apk+2.3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f878e722cef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8843577e6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f876ec21c57c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f87fced16cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87089b227d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f882004d7e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f879f06d4e9b.pdfIn PDF document text
    • https://site-1041765.mozfiles.com/files/1041765/18997710923.pdfIn PDF document text
    • https://site-1043307.mozfiles.com/files/1043307/karubuj.pdfIn PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/98808685265.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/e036698b-fdde-4c4b-9e17-c67ba2eecb39/92190346340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3474/6266/files/type_2_alveolar_cells_covid_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5392/6558/files/2727208842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/game_post_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8040/8476/files/summer_time_saga_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4211/8069/files/x_pro2_manual_focus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/jumutimenarigizozi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 6016 bytes
SHA-256: 9793b950fab8cd6495573149e3e7b0f1fc90342ed6a4f0d42ba3ef6aa0fd89b4
font_01_sfnt_off000076de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 10272 bytes
SHA-256: ffc4dd2641ef7aedce87513be459f0fc128aaf9441d5bdb432a05682e068b7c3
font_02_sfnt_off00009a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0A 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

Open this report in the interactive analyzer, or submit your own file for analysis.