Malicious PDF — malware analysis report

Static analysis result for SHA-256 a813063140ee5d16…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 00:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d2b59ec5cbb8334213c45afbbda8d84 SHA-1: 4ff818cd02c8ffd76b8d3457310b42194daab6ff SHA-256: a813063140ee5d16e3c28d210bc0c88bb0961918fef9a9c567dc1fe0e24e4264
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=difference+between+mood+theme+and+tone In PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/rapedotezewemufobiz.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/46554622974.pdfIn PDF document text
    • https://site-1042987.mozfiles.com/files/1042987/zoraralirotuxujudebine.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/36010508427.pdfIn PDF document text
    • http://files.drvallawalker.com/uploads/1/3/0/7/130775690/jibaguso.pdfIn PDF document text
    • http://tosafeti.okwupdates.com/uploads/1/3/1/3/131382028/8609958.pdfIn PDF document text
    • http://files.drleeinfo.com/uploads/1/3/1/3/131379409/jelotanazogodon.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/7ec38d3d-2b97-4606-b2c8-ee477a08e25d/9403260773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776803e1-c27f-4a1d-b598-3db3bc2cc69c/41573134281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad76bc9-aac0-4b10-b0e9-407874b64c05/rujasurejunozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dccc848e-e2f1-47d2-865c-81e569471a83/41305448128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b24c089-5d2c-4366-a275-0262caa626d6/tatogusabufataloxizudov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dceab429-4213-410a-a2ca-6118fcde0f12/pesepetufarevituxorulari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff18b4ab-123d-47d1-941e-cecdba1f40f2/puxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1df5a9-4add-44b4-87f2-17e12ba1d917/64192833461.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_off00006666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 5280 bytes
SHA-256: a25247fc95611aeb09fd56a5556e20751e197a758aeb5ff7203a45e8d2a99907
font_01_sfnt_off00007844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 9800 bytes
SHA-256: 2ddc60ecccfc0d8a3e5f60372565ed9d1f6852b32a5fc12cb830ad9af30e003b

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