Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a1e5493cdefcf0…

MALICIOUS

PDF

99.4 KB Created: 2021-03-03 04:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 997e877897fd8cc9cb638ee4d9a3f5da SHA-1: 06dea4ae9ae2b05e178244136fb4e073a01d1906 SHA-256: 11a1e5493cdefcf00cfec1f74a434a89b2a1b82670ba93236435e7227a9ee31c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document, identified as malicious by ClamAV and an ML classifier, contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of a 'download button' heuristic further supports a malicious intent to trick users into navigating to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and extensive URL usage indicate it's designed to redirect users, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=pain+level+chart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367633/normal_6005904472bb9.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/pajolujukevi_lebusumuzuf_zamiwe_buxiwujewit.pdfIn PDF document text
    • http://save50.pro/lojusiji8hn1w.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/gihekja/who_am_i_celebrity_quiz_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/bg7eSBk/lowes_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/jjRiQhc/cruise_ship_tycoon_roblox.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/28503752712.pdfIn PDF document text
    • http://procripton.com/arcanum_unbounded_epub_downloadr8v7l.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/what_is_the_average_depth_of_a_stackable_washer_and_dryer.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/proceso_de_investigacin_de_mercados_tursticos.pdfIn PDF document text
    • https://fozirufimagez.weebly.com/uploads/1/3/0/9/130969558/vunumin.pdfIn PDF document text
    • https://puwakama.weebly.com/uploads/1/3/4/4/134474688/xodigabinofiko_lerusufonexi_rerogotikavo.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/iajiihB/bridal_shoes_designs_in_sri_lanka.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/Vicihgi/landix._io_split_cells.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00014c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3A 4772 bytes
SHA-256: 3b4e91e9651b72cffcd8a8425212ecc3b0b7f5c823b136eddefd4cb9392c8348
font_01_sfnt_off00015c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C70 10780 bytes
SHA-256: 9090640bc7b6af6026545890f90bd6ff634f6b539c241c3eb6ee49ddcd740423

Open this report in the interactive analyzer, or submit your own file for analysis.