Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b2bfb56a291473…

MALICIOUS

PDF

72.4 KB Created: 2021-03-05 02:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0351f1fe3801a54fdd26af4d29e6520f SHA-1: 58211414456f89159cff175ed824d3c9d84a071e SHA-256: 65b2bfb56a291473c1c170985840a02fce0fc1bd3ce7fd0ac10012df39f28fcc
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/award?keyword=what+is+usps+media+mail+rate PDF link annotation
    • http://visiblawty.com/what_is_nuclear_force_in_physics7vi16.pdfIn PDF document text
    • http://andyhongdigital.com/pukoziwaletoganizyvjs.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/igvS6gd/paul_s_hot_rod_muscle_car_parts.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/8709203.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/igvjfij/strategy_professor_jobs.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/263ca99acb75da3.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/terewomof.pdfIn PDF document text
    • http://abanca-electronica.com/sofudepoduwakowgv4u.pdfIn PDF document text
    • http://zootime.store/american_history_reading_list_high_schoolnhqz4.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/f8788ab8-d2a6-41a2-b327-81af558fe664/92518064405.pdfIn PDF document text
    • https://6e6c7d38-9847-48b3-b514-8f7f5b5126b5.filesusr.com/ugd/63f22d_c3bbd794921b49b8aee96ad1e7fceea1.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_5a3ca2b4ef3e4251840ddbf1a279140d.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_df91b7f448f64e1a95b8acf59373b4ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd539680-b838-4fb3-8a32-c9fcc080dbe3/xelofojemegilo.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_457e1afda1f6440d83ab29f2c88cf33f.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_04222b4e5b524c91919affbfc3e6f0d7.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_f375436b41b94d00b63d255c548d8274.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_93dc2d74453e4c7d99a5fb3ca410a077.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_6396e00a4de44ffda63861adac6b54b5.pdf?index=trueIn 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_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 5212 bytes
SHA-256: 8afa630e356aa2a2ccc7d10d18294c8c523cf8c5ee9feb0bcb3f13233b73550d
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 9720 bytes
SHA-256: 69b0a816bae865274abfcef0f65d6178984aa6d51b91f9abe6504c05fa969493

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