Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cff3c9afe35bc8b…

MALICIOUS

PDF

47.6 KB Created: 2020-10-16 04:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28576b223f8d5d625f625010a883210b SHA-1: 2db1bba327fde950d8767a3f1e989fc93d3de894 SHA-256: 5cff3c9afe35bc8b289352742007068ddba1009d4bfbdf63e2ccd13420f50584
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/123?keyword=predicting+the+weather+worksheet In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/9611777.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/nofuxebunem.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/2307676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f88a816909bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f871e6d16ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f88d9d0a0c13.pdfIn PDF document text
    • https://site-1042501.mozfiles.com/files/1042501/sozipetivogevuzinonujik.pdfIn PDF document text
    • https://site-1042009.mozfiles.com/files/1042009/small_reader_apkpure.pdfIn PDF document text
    • https://site-1039420.mozfiles.com/files/1039420/88396169742.pdfIn PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/moduxogurenufitebuwine.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/lijamofofadak_zemudik.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fosaravufe_donimomes.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/32f1e16000bb.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/c46c2e78-7d18-4cf7-a41f-2d3483ab1728/4037966755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e18a3c-fa5f-4943-a434-1b3cf2eaa43d/gasukuxuxowezonovalokog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/army_pt_sit_up_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9333/7287/files/jerry_can_markings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/11637660907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6826/3062/files/dutodoguku.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_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 5112 bytes
SHA-256: 55a1d073399d988b3ef27987147079004c4adf70fa8e28a4e032e25a94b5aa38
font_01_sfnt_off00007f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 10280 bytes
SHA-256: 5eb5da3be7d51462ba68a7e9e4a33a483f71289e4cb202d66885bc167585324e
font_02_sfnt_off0000a2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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