Malicious PDF — malware analysis report

Static analysis result for SHA-256 8740ebeeb6e6607a…

MALICIOUS

PDF

41.8 KB Created: 2020-10-26 00:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 20d2b51a055684a7038d84828fbe9633 SHA-1: 7d3b86b57af9cd2f7073b91bc95e4bc10c476f3e SHA-256: 8740ebeeb6e6607a9a16c89a1d5895758c8eea90809453d891354852ee047936
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=industrial+electrician+job+description+pdf In PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/gibowadikufut.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/5131152.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/wofadusebugerepaxi.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/sipokidozuvumag.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/1057965.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/famefoj.pdfIn PDF document text
    • https://bowonusafepa.weebly.com/uploads/1/3/4/3/134319531/fc3de610d.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/zipujenuzenul_wirujumofijar_posopuzit.pdfIn PDF document text
    • https://kakakirikixego.weebly.com/uploads/1/3/4/3/134318951/dapajaxatav-xetonunotivama-lobiluvoso-watisowinij.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/bunoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5f9262b59323f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5f8bbaa11a05b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5f94f260b9bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f9110f186c05.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006492.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006492.bin)
    • https://uploads.strikinglycdn.com/files/e70065f7-390f-481d-8a18-712d1eda27c7/no_module_named_sklearn._impute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ee8493-4e0e-47eb-89cc-0a4348e177f3/46617884427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae0bc4f-1575-4cc4-8629-6f689ffd09d4/rufapumebodinefakoluboki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4083/2150/files/instantaneous_speed_formula_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8575/0976/files/vuweru.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wevupofetefogamivodinel.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/nuxelun.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/calendrier_2019_excel_et__tlcharger_gratuitement.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_off00006492.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 5304 bytes
SHA-256: 09dbd83825e96573ff659f309a2955cd3e049b168e3eb52806e96200e1600f2d
font_01_sfnt_off00007699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 10452 bytes
SHA-256: 775129ebe242c88fab166263dd587d9350e4b55a0c1fa890865464ae370d7cfa