Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49c1d31dc8efe75…

MALICIOUS

PDF

94.6 KB Created: 2021-04-01 21:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 12480441afef2c6a42d32ae38ec7456e SHA-1: b89bdec437f8b5110acb20c99d04a0abee2b9b03 SHA-256: d49c1d31dc8efe75631facdceab3199b92423105026e878b5aa55d918cec3f18
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'energy flow in ecosystem ppt', likely intended to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=energy+flow+in+ecosystem+ppt PDF link annotation
    • https://cdn.sqhk.co/bisadumiza/jihViex/52082814740.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/hjfV0id/shark_ion_r76_vs_roomba_675.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/4Yjitje/kulexes.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/eG4Ljgb/horizon_credit_union_utah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_603c869f7bf52.pdfIn PDF document text
    • http://xuwurexem.22web.org/finders_keepers_stephen_king_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/KXeNlii/reruladuzisivupaxigotun.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/26482863410.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/jedsgd7/50327076277.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/hjRidge/the_culture_code_rapaille_summary.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/the_rational_male_summary_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/qhhnEFL/100_greatest_country_songs_of_the_70s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_6015fe03ba10a.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/foto_s_samenvoegen_als.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/yaariyan_baarish_female_version_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8672ae2-a5c8-4ba0-86fb-30aabcedf804/pebagukel.pdfIn PDF document text
    • http://nupawibufa.epizy.com/android_torque_obd_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3a13c6-2b3f-46bc-9bae-074a1e44034a/79602641047.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_off00012aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 1724 bytes
SHA-256: a931ff3fa825443b93b369ae2d426ea300e579fad8992fa37b98769a4031c84f
font_01_sfnt_off00013377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13377 5276 bytes
SHA-256: 05ef51f0f18c5302bcb3359284c1cc4c2521f9ffa61617b7f4d0771323813f10
font_02_sfnt_off0001457e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457E 11628 bytes
SHA-256: f9d86d198e4ad8a341a196cbbc81dc2afb99968e06697f21d1407096a19d6ed0

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