Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b75939abede2837…

MALICIOUS

PDF

46.5 KB Created: 2020-10-01 04:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 40f3732c38dada00d1ee6f83d26bd8fd SHA-1: 80ebe0b73846f33ac443f25097af321fd36608f3 SHA-256: 3b75939abede2837ebc0a61824cd20641baea4fe8e8dc65d09369e4305da8172
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=learned+optimism+pdf In PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/59883269268.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/80005736261.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/zijamagigudowebubuzemo.pdfIn PDF document text
    • https://site-1039900.mozfiles.com/files/1039900/toserubupesixeniwefasika.pdfIn PDF document text
    • http://files.mindfulmedical.vip/uploads/1/3/1/4/131407042/maxefu-lowex.pdfIn PDF document text
    • http://jozab.165aircadets.org/uploads/1/3/0/7/130775448/kovaxizoterujipa.pdfIn PDF document text
    • http://files.paulgaucherandderochas.com/uploads/1/3/1/6/131606094/dizosolalonajizogije.pdfIn PDF document text
    • http://files.emmyduffscholarship.org/uploads/1/3/1/3/131384468/3379149.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/foramufamabotovika.pdfIn PDF document text
    • https://site-1039444.mozfiles.com/files/1039444/98781234354.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/98418567039.pdfIn PDF document text
    • https://site-1039149.mozfiles.com/files/1039149/zixilaziwofodipuxi.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/69ed1157-a39f-4ef0-93da-752f5bf6ec4b/44394181103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c1f65f-3e15-42e0-8ec0-ecb77b7726ac/kizunisineb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef295f-0d53-404b-8d8d-309328cc2b44/33606589506.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_off00006a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 4884 bytes
SHA-256: 62a3f9ec2834993809cecb2b2b568c086ecae09f122c1e372de4dfd060f24f0b
font_01_sfnt_off00007b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 10540 bytes
SHA-256: 033e318076acb001c42f5f170eb2fa7a80e0bd58e9ea5b73cc668f7660554c0f
font_02_sfnt_off00009ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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