Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c7a40a46cef13a…

MALICIOUS

PDF

64.4 KB Created: 2020-10-05 22:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78ca26376d87c01782f479e31a51b66e SHA-1: 40744c5f2656ba527f06b7674fe4042395438d1e SHA-256: 14c7a40a46cef13a16f4a1e6c3515fd77d044c41d98c3f5ebe7d8ea9bf2dd5a5
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://ggtraff.ru/strik?keyword=amazon+blue+badge+conversion In PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/10722642420.pdfIn PDF document text
    • https://site-1042679.mozfiles.com/files/1042679/40480303021.pdfIn PDF document text
    • https://site-1043457.mozfiles.com/files/1043457/nifetafar.pdfIn PDF document text
    • http://files.jennyclendenen.com/uploads/1/3/0/8/130873876/974212.pdfIn PDF document text
    • http://files.creativeprintables.org/uploads/1/3/0/7/130739263/2786867.pdfIn PDF document text
    • http://files.chan-candy.com/uploads/1/3/1/4/131438024/puvubidojazere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7242/5636/files/what_cities_are_in_broward_county_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2983/files/daytona_bike_week_photos_the_loop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8161/2446/files/clifford_j_harris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8111/1968/files/wuxitevowubesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de68d2ed-05fb-486e-b455-cfce948441fa/37500591240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348b90e8-7cbd-4c23-962b-3ea1bbe62104/tefogozik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b33cba-5bd4-4d65-bf48-f0f7d2a22485/xizumaxebotofod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01b00ba-dcb8-41db-aa9a-7b44ec3b8afa/39612985956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad351d20-0266-4b98-a06a-ab87c83444ff/bexegubejonaba.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_off0000bd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8C 5496 bytes
SHA-256: d540fe31174d76ee77e46a750d427d2115a27c2c08d6e2fb70fe5c4cbabced92
font_01_sfnt_off0000d02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02F 10596 bytes
SHA-256: d4cae49f668176e7df499a40806dfe4b69a9fc5822c290674713e4051375672d

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