Malicious PDF — malware analysis report

Static analysis result for SHA-256 725a7714541fabc5…

MALICIOUS

PDF

41.2 KB Created: 2020-10-08 05:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b473fbe66cf39b0f6c3a8fdc6edc4ba7 SHA-1: 62bdeb03a34d67c19c94dba77349ae8172723819 SHA-256: 725a7714541fabc5bb211b282f0a09808b998792963e00c877584c18a8fedf94
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=woodsmith+steamer+trunk+plans In PDF document text
    • http://files.andrewlock.us/uploads/1/3/1/4/131452733/285241.pdfIn PDF document text
    • http://files.brewingtonpreciousdanes.com/uploads/1/3/1/3/131381677/5128994.pdfIn PDF document text
    • http://japufo.harborislandgardenclub.com/uploads/1/3/0/8/130814328/sezamiraditebi.pdfIn PDF document text
    • http://files.rialtotrophy.com/uploads/1/3/1/6/131606006/6576454.pdfIn PDF document text
    • http://sokijeg.nimu-mm.org/uploads/1/3/1/3/131379894/ab46321f2c6.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/79bd5b1e-0f29-4239-98c4-cc0e3d165079/21450108219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d5df35-3352-408c-b1d5-8f119a5175d5/71055442014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87d98e9-1afc-4ca4-b4d5-7a01165e1845/31270501781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8e155b-6355-462a-8b47-5d008b5af460/80796115796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0d4cfa-461b-43c1-b803-9ce46df551ea/nigalijibimixegutozoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53835bd3-6f6d-45e6-a5d6-d1997c8cb396/wejagugofemanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685f5a8a-0780-4a8b-a9f7-0cb6d8a4510a/finojopowulipomixola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f299f1b8-433f-4e7b-8638-728bb11abcd4/xunomedunugadumaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb77e15d-53fe-46d8-ba67-8e5bf2f400d8/57601057823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68dddcc4-3c8d-48e3-9f00-76b072a2f931/30485736566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/bojojowiluwaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/42989677593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9874/5253/files/high_school_economics_personal_finance_projects.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_off00005699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5699 5160 bytes
SHA-256: 61c592b06a19f2acf0577a3d2fa1d9773a6a503954223fb0c37fed76dba4a23d
font_01_sfnt_off00006804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 9744 bytes
SHA-256: 8f0bf5f37ca6811147a4a89133d2ef6112e57798ed8f767073323f355dbebd63
font_02_sfnt_off00008964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8964 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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