Malicious PDF — malware analysis report

Static analysis result for SHA-256 563e79353400fcdb…

MALICIOUS

PDF

89.8 KB Created: 2021-03-10 17:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef40e367b3ad503be8f42f4bc8e6ee0a SHA-1: 2844f0adb598774ba6dd319bd95e676ba590023c SHA-256: 563e79353400fcdbf1addd5cce12fef2c71a3e628865a4e881a8c3f812700571
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=manabadi+ap+grama+sachivalayam+hall-+ticket++process
    • http://covid-19online.site/como_fazer_assinatura_digital_em_documentou8bti.pdf
    • https://cdn.sqhk.co/febowozefu/Ithhham/neo_geo_emulator_plus_roms.pdf
    • https://cdn.sqhk.co/kitatoze/ikwiLgc/space_bricks_breaker_puzzle_cheat.pdf
    • http://com-connexion.xyz/vupaxofawedabuduloselepu9bo.pdf
    • https://cdn.sqhk.co/reditifotep/9gfijgj/bitisadal.pdf
    • https://cdn-cms.f-static.net/uploads/4419236/normal_60132b015be2c.pdf
    • https://static.s123-cdn-static.com/uploads/4368244/normal_600070a71d4cc.pdf
    • https://cdn.sqhk.co/xeviremal/gighzhe/abc_song_in_spanish_military_style.pdf
    • https://cdn.sqhk.co/vetukalujir/ghVOZgf/18653898790.pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_601b74f8c02de.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_603259bf16df3.pdf
    • http://storeeuro.info/il_ritratto_di_dorian_gray_film_2009_streaming_itaiph3t.pdf
    • https://cdn.sqhk.co/furaxofir/VhgYkk6/bakipovifujufubo.pdf
    • https://cdn-cms.f-static.net/uploads/4369671/normal_6028e6ece19cd.pdf
    • http://aarbuz.space/enlightened_journey_osrs_quick_guidez0ooo.pdf
    • https://cdn.sqhk.co/vudupapuj/XOLUYgd/street_fighter_iv_champion_edition_pc_download.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_6f88ada2166748bdb775e0e01d33c8db.pdf?index=true
    • https://s3.amazonaws.com/tevigotu/fortnite_aimbot_pc_no_survey.pdf
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_291b59377178419b82cae8161fe6abbd.pdf?index=true
    • https://s3.amazonaws.com/mejados/jacoco_report-_aggregate_0_coverage.pdf
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_67b539ad842141d99d888ddb0e5e87d0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001026d.bin
3382175a0cd51a0eaaaa35f66f89886d70db0d0e909eb90bf7118a8dbe0286dc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1026D 16148 bytes
font_00_sfnt_off0000ee75.bin
26fc7d4cbea5c560f6bb2a0d8f19f355ec46061f2107fc4eaee1f5448b5ac76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 5888 bytes
font_02_sfnt_off00012e9f.bin
0e42db90e12bd3d7e63caab102bf1d3b51b1b0a47bd2e01d639c7b3e9f3bb838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 12696 bytes

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