Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3c0831dbd032b1…

MALICIOUS

PDF

35.6 KB Created: 2020-10-03 00:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bfd17f6fc0ac859718afc8ceee1c49bc SHA-1: e05a1ef369584485905225571742bcdcd618c879 SHA-256: 5e3c0831dbd032b19dd643f85a5a9e6a45180c6d472831dc0026808afedd97c3
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://cctraff.ru/pify?keyword=planned+parenthood+usc In PDF document text
    • http://mugifobap.davewaite.info/uploads/1/3/1/3/131383664/8599142.pdfIn PDF document text
    • http://woridome.villageofeaston.com/uploads/1/3/2/6/132680839/tiloro_zubor_xenexileg.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/74432188474.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/75508990125.pdfIn PDF document text
    • https://site-1040142.mozfiles.com/files/1040142/52197113924.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/milaginujamoxorisikuru.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/39926931506.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/19f63737-3327-46ad-b38e-5d7b4b3d283d/gilumifevijir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3463ce-3fc9-45b4-a562-895e942ca27d/87106719811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a0c3a7-8951-4395-b05d-02874fd906be/1409149442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd55efe-24aa-4ad3-806e-dc711f7bd5f0/nadewuvoxetudavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cec675-1619-4084-a272-9796855657af/20372158296.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_off00004e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E51 5164 bytes
SHA-256: 0e7ab606b74bf62b9496b9edf620990cae563a3307be0440bf4e084ce188d134
font_01_sfnt_off00005fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 10216 bytes
SHA-256: 37b74a96f58dffba853a9f84212ad0a5ef8e191de2f14d22556b2757a065d386

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