Malicious PDF — malware analysis report

Static analysis result for SHA-256 940870fbc60849aa…

MALICIOUS

PDF

59.9 KB Created: 2020-10-16 07:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0992c3fab1149cace0835b314692ab47 SHA-1: e3937e17261ec4ec7ca6b7e0c83621ada4fc76c8 SHA-256: 940870fbc60849aa0b65e0134d6e191719c0c66d7dc88cf7c9fb93d835118150
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?keyword=20th+century+harmony+persichetti+pdf In PDF document text
    • https://site-1038920.mozfiles.com/files/1038920/15829521020.pdfIn PDF document text
    • https://site-1043805.mozfiles.com/files/1043805/wopijol.pdfIn PDF document text
    • https://site-1041483.mozfiles.com/files/1041483/23903769238.pdfIn PDF document text
    • https://site-1042884.mozfiles.com/files/1042884/76790279779.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/1c559745df.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/sexafefalumulowonusu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/dibuteloda.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/tomagujaxi.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/da4292937454ee.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1073721.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/9df7448996f.pdfIn PDF document text
    • https://site-1039838.mozfiles.com/files/1039838/57118037146.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/nuzoxub.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/dexaxevojupadabi.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/dodujevazukuvud.pdfIn PDF document text
    • https://site-1043337.mozfiles.com/files/1043337/11588156083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8731ba3d452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f88d7196293d.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/52102f59-4f96-4a9c-bdf6-0460ce138262/wojes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912e99f2-ff1a-463f-9fe4-7343d51c3e78/genunokulofelosagenigek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8addc9b6-c604-492e-bae2-7d66b8e629c9/nawokekevekina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c43df6b-d59a-4a49-bccc-2df780d9f2c2/kutojuvekadasejenate.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B9 3616 bytes
SHA-256: 1aaf785f6999deb406479ff056add5c2ba3ac707edfc9832acd5b1c8222b32ac
font_01_sfnt_off00008f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F95 5528 bytes
SHA-256: 67b5b3dd1dbe4fb94e4412e2b86a173b3f70922231dde23f685772a90ab50f18
font_02_sfnt_off0000a224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA224 14936 bytes
SHA-256: 7884e8fd0d41d38b1da4830f396f66e13f86dea4c29c401432e89990dfeb174b
font_03_sfnt_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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