Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc5ad8a90f2bcf0…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 02:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 15d590bff41d6746909f6857c5547ff8 SHA-1: 59076ccb0b38637d4e0648694b33689a8fa4460a SHA-256: 9dc5ad8a90f2bcf0d1b632abc836facf4cce40647ad9bedd5aea3bd165dcc442
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=interior+designer+jobs+mumbai PDF link annotation
    • https://cdn.sqhk.co/baruduwege/6jfihQl/kill_shot_game_cart.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/zozujudubalutaxiluxa.pdfIn PDF document text
    • http://skout.tech/application_letter_format_for_project_acceptancepqei4.pdfIn PDF document text
    • http://zodazaze.22web.org/33102141982.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/hdYhhwN/skateboard_tricks_basic.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/ojagcSA/vetiraxaminap.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/iiEjaib/97864548290.pdfIn PDF document text
    • http://kernig.online/de_centimetros_a_milimetrospwtbk.pdfIn PDF document text
    • http://hot-money.fun/bendix_king_kr_87_adf_installation_manualb725h.pdfIn PDF document text
    • https://digojumowixev.weebly.com/uploads/1/3/5/9/135989627/jisojerab.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/aijghia/serpent_battle_arena_ff7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5fcc809b70b8b.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/PQtvhhI/rank_one_sports_login.pdfIn PDF document text
    • https://cdn.sqhk.co/roweziwamu/Vjejbhg/nasa_vegas_hotel._com.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_6000c281bfad7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413005/normal_5ff2809c3c170.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/y8jjwFi/vex_3_game_distribution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5fe3eef611366.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bokubipojofoji.rf.gd/bottom_navigation_view_with_fragments_android_studio.pdfIn PDF document text
    • http://sipesunerep.epizy.com/rosilale.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C7 5268 bytes
SHA-256: b86ec4df30a700d23deea66a6307d593fc5bccd07aeae2bd8e744ed6ecb6d9a6
font_01_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 10224 bytes
SHA-256: 60f06b66e50aa6a06b40a164c35db0b4354cb83f29ac2379f66c88f2bee0c10c
font_02_sfnt_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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