Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd28c04870bf1e8e…

MALICIOUS

PDF

47.1 KB Created: 2020-11-01 02:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b500e5b9656176a607d8fcd770b9a90b SHA-1: 1ee342911d9c72fe756b22cbb6aa2ecad70cf738 SHA-256: fd28c04870bf1e8e18ca912c78fafc66450e1551e68475802aaa18d9604eb760
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/pify?keyword=line+rangers+pvp+guide In PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/aa83119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f9d34bf59210.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/gefunepegetaguvagupu.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/fofuwumok.pdfIn PDF document text
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/voposukikag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f95829cddadf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f8f84cacb829.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5a80308c0c4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f9a1a649eccc.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/2774461.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/15022.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000064f1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000064f1.bin)
    • https://cdn.shopify.com/s/files/1/0500/5498/7969/files/40768928678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/income_guidelines_for_medical_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/lowrance_elite_7_ti_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8203/2315/files/uh_transfer_requirements_kinesiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3640/9493/files/arabian_nights_full_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/26047447759.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_off000064f1.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00009a35.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00009a35.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 5096 bytes
SHA-256: d10678a8ff9e00733e7319658a4ec56f03fc323e11c67ea722ccabc1f0aaee24
font_01_sfnt_off00007663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7663 10480 bytes
SHA-256: a73428927768ea9de77d79def1647efd4ed07529d8d066fc1accfa3c664b81dc
font_02_sfnt_off00009a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A35 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848