Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ce094832035d2d…

MALICIOUS

PDF

56.3 KB Created: 2020-10-15 01:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 024cb799f2856276c693c9bffd02583f SHA-1: d2886738be6fc5948a0007ac43c635d7246c8cad SHA-256: 98ce094832035d2dc6721723fb8c324d16c19606776892dbe4524e57e1934ced
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as legitimate PDF downloads, but they redirect to malicious infrastructure. The primary heuristic firings indicate this PDF is a link farm designed to redirect users to malicious sites, with one URL specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=manual+de+robotica+industrial+pdf In PDF document text
    • https://dujewukemapaf.weebly.com/uploads/1/3/1/4/131453220/konipojumujud.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/gowusovamijisox_gixen.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/2886072.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/9220672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f875ed142946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87156fc0d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f872ec6d437e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f872da90e2e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8777a8e4db9.pdfIn PDF document text
    • https://site-1037253.mozfiles.com/files/1037253/negib.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/98868074188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f87526e98570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f87790f8dbf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f874b1443238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f87335f0e32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87673a3fb80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/oath_of_conquest_5e_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4525/2003/files/asl_at_work_unit_8_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d1dec0-fad4-4def-af04-13c27da46b6e/sudaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4865e4c-e666-4c83-8c21-f3bd565d147c/83901448870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdb93f5-971c-45af-a237-d40b9d5a9578/jozodipuzonogogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEE 5176 bytes
SHA-256: 052ce16fb5bf6c3cc229ff603e204cc9d5b56cd1f1d327a9a54a73f856e9a160
font_01_sfnt_off00009f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F89 10680 bytes
SHA-256: d7c9b61235b4b406d1aa26aab26ae379be294a66057f7fb48a358e6080f6213c
font_02_sfnt_off0000c3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230