Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b65fa1528878764…

MALICIOUS

PDF

49.7 KB Created: 2020-10-16 02:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c46143169ba2d3bcdb096266f482b5f5 SHA-1: 3d00c3799736d351b553b94532c33873d3944639 SHA-256: 5b65fa1528878764649f695aeb2f1c09b61af05b328ce3e1a65e9a3e484a1573
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/strik?keyword=wide+sargasso+sea+annotated+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f880be14931b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f875ee309349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8735f4d717b.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/18c46ddaf0eb7.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/nokekul-feboji.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/namozofe-mokedupuzujemag-rapazuxig-gemolidade.pdfIn PDF document text
    • https://sadutixonigonu.weebly.com/uploads/1/3/1/4/131412491/457a29a.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/595b3a9104831e.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/larumasex-japexexofuwed-pepuleb.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/1582369.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/04e8357781d.pdfIn PDF document text
    • https://site-1042867.mozfiles.com/files/1042867/67730443834.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/wizorowamisuwusezifif.pdfIn PDF document text
    • https://site-1043669.mozfiles.com/files/1043669/vurejegodojizarigelusij.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/1/0483/6714/1017/files/short_motorcycle_trips_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9302/3638/files/wanagojajipatulesesab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7924/9319/files/likedike_apk_unlimited_coins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1604578c-ec6a-413b-9dad-da567b3d4d3f/89322153181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2df716-1ae8-45b5-819b-50a794ff40e2/vumakafelew.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_off0000788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 4976 bytes
SHA-256: 7654db0b48ad58bf4cdb48f26d2a3cadfa757e5eafc1646939ae97a814e06388
font_01_sfnt_off0000898f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898F 9908 bytes
SHA-256: a161bd69bb1d9c88aca6083c59507b6bf9ff45fdb2e38919465105243e3da585
font_02_sfnt_off0000ab89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB89 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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