Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c5e1e15ab6f0a4…

MALICIOUS

PDF

46.1 KB Created: 2020-10-10 04:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fbcb95b3c88dce5afa430fa89fa52e57 SHA-1: 63030ec5930cdc0d4f0493261653ee2191d3f2e1 SHA-256: 01c5e1e15ab6f0a4df480d68868925d3186db76a0963ac20ae2875437c6d4527
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://ggtraff.ru/strik?keyword=3rd+grade+economics+worksheet In PDF document text
    • http://files.technicalwritingonline.net/uploads/1/3/0/7/130739060/vokezanekapuzevut.pdfIn PDF document text
    • http://files.racqueteerstennisclub.net/uploads/1/3/0/7/130775677/57c3cbf06da.pdfIn PDF document text
    • http://files.sydniedphotos.com/uploads/1/3/1/1/131163969/kitanufosuwejux.pdfIn PDF document text
    • http://files.telj.org/uploads/1/3/0/7/130739831/3e6d69d2c.pdfIn PDF document text
    • http://files.thecrossingfairfax.org/uploads/1/3/2/6/132681625/932530.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/17714490094.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/47977351645.pdfIn PDF document text
    • https://site-1044071.mozfiles.com/files/1044071/labujos.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/9e9b9227-0075-48fe-b697-a4016e813ea9/niniga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1657d24e-de94-4a6f-b12e-edf27fc18ff5/jodevurabolulavomutimowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da78a480-6d9d-4fab-817b-102dded2e046/93735620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28aa9c7e-0b29-4c73-84d9-03c42ac35439/wofapemodunomezuxedusunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d9e382-909c-4585-a93c-2e98c2efcc70/7741100754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92261a0c-7215-4a9c-8437-a64418f2f411/tuvasona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697c3126-f1fc-4a9a-ad55-ce7772133088/24073182290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd14c03b-f030-4e27-a1b6-7d31639334f0/98784665865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58dd9263-e40b-498d-905a-06627a1a811a/33953897275.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_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 5336 bytes
SHA-256: 29051cde5f3edca4b5ae20d74b3b756149c1aa7f8d18bdb79b58bda3851214d6
font_01_sfnt_off000079c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C8 10460 bytes
SHA-256: cc8b6ca34b19b207fc44ec27870d8da3253534918adbd496eec5e01f764b7bd8
font_02_sfnt_off00009cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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