Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4445956e262b23…

MALICIOUS

PDF

39.0 KB Created: 2020-10-25 13:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2a2f244da46477eec70824bd604ad1cb SHA-1: 5b1d3bce54645e61623214f3f81ebeafaf34997b SHA-256: cb4445956e262b23360109f3b82fc35b75ae7a615748b6e4c754cb2b607c4c18
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/aws?keyword=blockchain+anti+money+laundering+pdf In PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/6e27b9f70.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/6801859.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/dopaviwet.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4b8c57f23e76d7d.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000058f6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000058f6.bin)
    • https://uploads.strikinglycdn.com/files/84fd2229-ce7b-4117-9fd8-95a661dc9b8a/lajaxelofol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800f2403-3e1d-4105-abc1-f34c7ab65174/zugedezabal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70fb6ff-4079-42ef-8303-0d8c0f08ce77/81667700595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7b77f4-16bc-42ba-9533-23436794693e/ziweluja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd9552c-a40b-4a0c-b789-48db005a38bf/47124072738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/76021564292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7662/7863/files/arabic_numbers_1-10.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/blackberry_bold_9700_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/98836533922.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/dexuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/libro_barrancos_mooney.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/alagappan_medicine_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4165/5454/files/algebra_2_graphing_exponential_functions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/landscape_photography_apps_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/gawovepalaselex.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 extracted file (font_00_sfnt_off000058f6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F6 5608 bytes
SHA-256: f135e6e4f889829755817ef593863a5087a701632af21aafb20493763871534d
font_01_sfnt_off00006bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 10312 bytes
SHA-256: db563f843ca558f16f2a55ffd3314d48c59e8a1d62f9fbe8fe8a4e98cbb3c65b