Malicious PDF — malware analysis report

Static analysis result for SHA-256 9368462c1facf6bc…

MALICIOUS

PDF

39.9 KB Created: 2020-10-30 14:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 201532925e5c19a39dd61231d226c2eb SHA-1: 2b90be755cc05522e240441f19779c11ee65e006 SHA-256: 9368462c1facf6bc6fec0e14c88fc2cfea8be7f300f5373649d0535a240ee804
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing attempt. The ML classifier and critical heuristic firings strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, reinforcing the malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/pify?keyword=fluidmaster+model+300+home+depot In PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/topibezeniwakoxoxego.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/bejusawufatitib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f8d008b51fd4.pdfIn PDF document text
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/2383862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f879e182f61a.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/4135560.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/tetokesajemidop.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://cdn.shopify.com/s/files/1/0500/5833/0283/files/steel_structure_book_by_negi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/15061023154.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/vajafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3627/6411/files/convertir_a_en_linea_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6739/0120/files/64_yogini_mantra.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_off00004e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4C 5236 bytes
SHA-256: a7978448890f0bef6250feeecb23e4eb09935c89d675846d827e7d02422e36b5
font_01_sfnt_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 10828 bytes
SHA-256: cfd1bd17bbe31f935e40961624e8e09d5c2bec6cf26eb28e7af2e82b1524ec7b
font_02_sfnt_off000084e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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