Malicious PDF — malware analysis report

Static analysis result for SHA-256 013a0f797947e669…

MALICIOUS

PDF

51.4 KB Created: 2020-11-07 01:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 719c1d3b4b33b290c9f717baaa9b4d09 SHA-1: 3818539d646d69d6a7d9f19afb4e053d93fa0527 SHA-256: 013a0f797947e669ba2dd5c5c3d1ece539704f796b065d9717c02938499ddfe7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=st+martin+s+guide+to+writing+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5f9732c834d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8ef5205124b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5f9d95bc80820.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/zegugab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5f9bee9b8d820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5f92453bbc119.pdfIn PDF document text
    • https://gituwere.weebly.com/uploads/1/3/0/7/130740556/877231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/btd_battles_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/rowewaxitiduwesixovabibel.pdfIn PDF document text
    • https://korejon.files.wordpress.com/2020/11/xodanovomufuwikolitekeron.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/mifusovigizesipavibexox.pdfIn PDF document text
    • https://nixeporebumo.files.wordpress.com/2020/11/attack_on_titan_episode_16_english_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/adobe_premiere_pro_cs5.5_tutorial.pdfIn PDF document text
    • https://xanafegeze.files.wordpress.com/2020/11/lukobifov.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8981 5524 bytes
SHA-256: 911141471c6f639def93e416b8750d4dda061b40b0cc3390763554330670caa6
font_01_sfnt_off00009c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C46 10712 bytes
SHA-256: ea2e0cd1411d7bf13d1d843eb6b29a73b3227e55ad951608d94ebd52be0c285d