Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaa58a3cef6190a…

MALICIOUS

PDF

43.9 KB Created: 2020-10-02 21:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a6f0d1e70b6e3deef52affe400739194 SHA-1: 6915724ab1b0659a92a3436025bd44fa1bab7214 SHA-256: 3eaa58a3cef6190a7779c4f6798af2c65cde95bef0fe2d1162da1d7c362bbce0
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/strik?keyword=palabra+miel+santiago+atitlan In PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/93073050406.pdfIn PDF document text
    • https://site-1039420.mozfiles.com/files/1039420/70488699430.pdfIn PDF document text
    • https://site-1038901.mozfiles.com/files/1038901/26812023553.pdfIn PDF document text
    • https://site-1038351.mozfiles.com/files/1038351/loranijiwevufibo.pdfIn PDF document text
    • http://files.floridapantherfestival.com/uploads/1/3/2/6/132695492/piwuwa.pdfIn PDF document text
    • http://files.herbivoreresearch.com/uploads/1/3/0/8/130874559/remuku_xoninodasevijo_bexipipojozus.pdfIn PDF document text
    • http://files.saskstealth.net/uploads/1/3/2/8/132814371/3951029.pdfIn PDF document text
    • http://files.authorizedealers.com/uploads/1/3/1/8/131871467/remuwi.pdfIn PDF document text
    • http://files.freestylecandles.com/uploads/1/3/0/8/130814594/widapanumesag.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/97003627939.pdfIn PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/40382366567.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/77241c90-97d5-4860-a6a3-a95040092e23/bopadorerasejezes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16acfbbd-c278-4fa1-9504-16046000c079/zunijegisiwolefofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2fe7557-39f2-4069-94af-ed73ed1824b6/tinepuladoroguletubafetis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717779ee-b343-4de2-a1f9-4b23b5c7bb42/voropowetidetizojavelo.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_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 5144 bytes
SHA-256: 72d0b43450c0f72d0fa4b4b314a50401a5cf1e0c9bff36ca1e27dd0608b69ec6
font_01_sfnt_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 14008 bytes
SHA-256: 9618457618429f94eac1b5d2b63b0d8019a58b9d5c42b9f1afb9dc9dc23f4354

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