Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88a58621fd7ce38…

MALICIOUS

PDF

63.7 KB Created: 2020-09-30 04:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e58405710e5fc0fffcfec697c6f05343 SHA-1: e867c7a2618b7bb6a73d4a82ba4ea016913e65bf SHA-256: d88a58621fd7ce38f84667f438d51b6a2809d6b9d8f87b8b0fd8aae2f34e017d
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=carcassonne+game+pieces+pdf In PDF document text
    • http://files.mduvallportfolio.com/uploads/1/3/2/3/132303269/d29091fcabb3.pdfIn PDF document text
    • http://files.chorleyhelpthehomeless.org/uploads/1/3/1/6/131637176/banor-mubumomunepib.pdfIn PDF document text
    • http://files.spadeesperanza.com/uploads/1/3/1/3/131398547/6669510.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/60025032656.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/15776094725.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/88075403985.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/1/0432/8469/3160/files/minecraft_pe_apk_0.13.0_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7931538-5701-4e3a-9bf4-d39416949f5d/zuwajekober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c800d8-4078-4466-bc4e-29aa3846282d/75760521675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5c18a9-86f2-4eef-be4a-a960f03793d5/nutugazomizo.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_off0000af3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3D 5176 bytes
SHA-256: 6b29869f53d5085fee8031fa99b7af448daef3c4a44b08ff0caab2cbabad4e28
font_01_sfnt_off0000c0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B5 10208 bytes
SHA-256: 3688b4c43d95f242f742a0714a91ba743de6cc632c28f7381ada363b14cf8ee2
font_02_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378