Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f65448d948fe50…

MALICIOUS

PDF

44.5 KB Created: 2020-09-30 02:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c678163db93d86ae7f520cdd2f97df0 SHA-1: a01e59a3d28c7a1fa8dd735aef717d8c882463c4 SHA-256: 10f65448d948fe5098f3ee725b2f2a08c39e4561dcc7311693867ff768e12710
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=english+articles+a+an+the+pdf In PDF document text
    • http://files.thehorsebakery.com/uploads/1/3/2/6/132695543/xobitabit-nafobegado-vojevowitobi.pdfIn PDF document text
    • http://wekofew.splashesandstylish.com/uploads/1/3/0/8/130873997/jenuputenasujef.pdfIn PDF document text
    • http://files.aampmuseum.org/uploads/1/3/2/6/132681391/365273.pdfIn PDF document text
    • http://fopes.preservationsc.org/uploads/1/3/0/7/130739640/7725969.pdfIn PDF document text
    • http://files.tacameraclub.org/uploads/1/3/2/6/132682327/kuxafiz.pdfIn PDF document text
    • http://files.johnorlandfurniture.com/uploads/1/3/1/0/131071145/fegomopero_sijanuzenotew_linawade.pdfIn PDF document text
    • http://ragonasa.hpsst.com/uploads/1/3/1/6/131606003/4760891.pdfIn PDF document text
    • http://xiwiwot.alchemyharvests.com/uploads/1/3/1/6/131606407/lejegufetupime.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/1/0434/1691/2023/files/kakegimowelopukerupeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/39756364215.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_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 5052 bytes
SHA-256: 32bda68b7baea0e91248470eadcaac77264a26e8b7773c97f8b3eb6ab71ce874
font_01_sfnt_off0000746a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746A 10172 bytes
SHA-256: 2aeb368f877da5d3eda07c12ab4992d9751a4e3954d7aaf069c6f5c0b8df61e7
font_02_sfnt_off0000972c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230