Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a5d712691e1211…

MALICIOUS

PDF

52.1 KB Created: 2020-10-01 03:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: be682a0cccbb5499ce1bc5b9e0ebf1b5 SHA-1: e245e0c0e83e15d361fc52825633a36fc42c1b45 SHA-256: e5a5d712691e12112fbfe4e023f49b0d1e68dd322c1d1c5bd0b14953a124be50
132 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+tutorial+in+hindi+pdf In PDF document text
    • https://site-1039784.mozfiles.com/files/1039784/bozemewukakobiduze.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/xewesetibodunatifoba.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/kelekekonikadizo.pdfIn PDF document text
    • http://dazer.seislagos.org/uploads/1/3/0/7/130775136/9504171.pdfIn PDF document text
    • http://files.karengilchrist.com/uploads/1/3/0/7/130775200/rikekexubefozama.pdfIn PDF document text
    • https://site-1039472.mozfiles.com/files/1039472/46216629680.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/73075873837.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/1/0463/9588/3675/files/baby_videos_tamil_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/lolixifut.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_off00008f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F03 4940 bytes
SHA-256: 7bbdde6a0ceccf3cdb109749da009734c4263e2104d8f4a2ac6fc158c392952d
font_01_sfnt_off00009fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC8 10588 bytes
SHA-256: 6119441904e0847a13895d41948a7c6d5cce6bc20c3445ab64736c1a2c21dccf