Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdcb7fd554e1031a…

MALICIOUS

PDF

48.5 KB Created: 2020-10-05 12:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4e30683e9f13d662f0bca27b1a5c0c62 SHA-1: e6f30b4aad9dd1bf85e2e6fbec48dceee5c9b2fe SHA-256: cdcb7fd554e1031a909e86332eb5d71571391dd7f6bae4bcc3ec850dba757dcb
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/pify?keyword=u+adjectives+negative In PDF document text
    • http://files.rumforddental.com/uploads/1/3/1/0/131070911/tedanowekox_lakora_bakobo_sabamumidepojef.pdfIn PDF document text
    • http://files.harvesttime.org/uploads/1/3/1/0/131071035/pawunopenelisejire.pdfIn PDF document text
    • http://files.itswhereyoubelong.com/uploads/1/3/1/6/131607712/nokaxomowuvimi_wapezizogosori_guputotinokaw_rawanupivir.pdfIn PDF document text
    • https://site-1039563.mozfiles.com/files/1039563/wazovurijefavipun.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/lozobefujamoxo.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/32551446088.pdfIn PDF document text
    • https://site-1036944.mozfiles.com/files/1036944/melizogosak.pdfIn PDF document text
    • https://site-1038349.mozfiles.com/files/1038349/13176250122.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://uploads.strikinglycdn.com/files/a6b972d2-d53e-4fa0-9db3-fe9629af0190/46633017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded788fb-b3f7-41f1-9993-3be5fd187649/titudibatavamubodon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28df5e2-b64e-42fa-a811-016d2881e8cb/vomekanagadakowunozamupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7458c94-4218-4f29-a865-a42e6fd46c0d/karevapifavovevub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2a0263-e55d-4da4-9d85-ad47dc6a409e/13962409830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cba8499-9ffa-4487-bf88-3f117cbe8c10/89220912205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d02709d-31fb-4244-804e-85e9d658d410/95289879813.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_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 4784 bytes
SHA-256: 3e7c15269459e305c0462deabeab96866c504cffdae39c70c01aed62817b0537
font_01_sfnt_off00008205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 10860 bytes
SHA-256: 048c1ee48a754af40e616ebad8b61af0988c90db93a8f102c798af7c9ef4ef0c
font_02_sfnt_off0000a705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA705 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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