Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b365e3ebdc7d839…

MALICIOUS

PDF

36.4 KB Created: 2020-10-10 15:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4e957fcd4f7db7b65c6b3605fd0a86f4 SHA-1: ca788cb4324e5be5ea84ea5df8ec3d4a33e67ac1 SHA-256: 6b365e3ebdc7d83956a0a43bcea555af82339faaa16f2427f017a95d7d9a699b
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=the+spongebob+movie+sponge+out+of+water+full+movie+free In PDF document text
    • https://site-1044240.mozfiles.com/files/1044240/91137829686.pdfIn PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/80825810262.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/jusoterenatewu.pdfIn PDF document text
    • https://site-1041486.mozfiles.com/files/1041486/dawavabidenijutixonofan.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/dajojimopakibokova.pdfIn PDF document text
    • http://files.biodigitalarchitecture.com/uploads/1/3/2/3/132302718/nabamejuzifazofuj.pdfIn PDF document text
    • http://files.maltaglasscreations.com/uploads/1/3/1/6/131637316/8677662.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/4050184e-50fc-483f-88dd-fb7bb22f2577/relotomafelof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e730fe-19d1-42fc-b96f-23caa44589f1/zejixapibozalobugena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd0f15f-f664-4334-9f50-5f8bdb595d3d/68837642853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2cdd21-6ed9-4227-9ae3-7f1dd685fc3a/79401163592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e1f9ec-3423-481b-b320-820e6c8f636e/lasub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40d4023-2e2a-43c3-ad09-285a496f5708/leragodolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e6dea8-9ae6-4718-a1ca-57c07f6ddda7/49617556330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb504c30-bef3-4db9-b037-1306d1bd693c/pilaleximijef.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_off00004e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9F 5556 bytes
SHA-256: abf8fb1fd2a807e0e45d588d4dff54e9549e09e3ad9fc0ae7cf5ad0e5198b158
font_01_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 10148 bytes
SHA-256: d652c4f24a055155584b56ca1c1d22c71fcc1d391ff901e0a2e701a995ac7e3f

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