Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66df501fd430f37…

MALICIOUS

PDF

65.9 KB Created: 2020-10-01 00:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d71e83e274031aa32ba2e0222229e04b SHA-1: 5f2b8fc5d24e3d5a23d6c4ab183418ba67b50e7c SHA-256: a66df501fd430f378d1c9334e905c4579475f1f7a2891dfe1c912200fa7f132f
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://gettraff.ru/strik?keyword=agents+of+socialization+definition+pdf In PDF document text
    • http://files.kileykellermeyer.com/uploads/1/3/1/4/131453753/2190707.pdfIn PDF document text
    • http://files.nestpetexpo.com/uploads/1/3/1/1/131163977/xugijulod_bedijizado_tivit.pdfIn PDF document text
    • http://files.kcbcstore.com/uploads/1/3/1/3/131382808/d79013a2.pdfIn PDF document text
    • http://vagojive.glasgowfad.com/uploads/1/3/1/3/131382030/5912487.pdfIn PDF document text
    • http://files.macptsa.com/uploads/1/3/2/8/132813998/femewev-refexenenenopa.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/55531385691.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/47713568590.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/46540850136.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/14b1353b-2388-497e-9d4b-e933e2f725a7/vuselale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92711af-87a0-486c-bbce-41b57dbf2d62/zivowobexuteporilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0288c12e-cfee-4dba-bdba-6d0bd24fb767/legidosexenum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df64eb1b-cb51-4235-ae6b-2a94d580cf0d/94581130204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01de598-57c4-46cf-aef2-6dfd364a637d/memozodexezovofopuzeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cbf0018-566c-461e-9e17-7cf96a285d04/58961339574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32dbf934-6459-45f6-93df-a429ff59b6e5/fozibiwebutuxowumuv.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_off0000c2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 5264 bytes
SHA-256: 1556428cd7fbab863a03dcd4d9cf6748eea9196990f0c7a7e988eba0e3af7759
font_01_sfnt_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 11016 bytes
SHA-256: 77bc6747e0dbc3eac14de2e5b9c026ba4004e6cf38ea612b9fe0f3116f089bff

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