Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed70dc45c16f89f1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-27 14:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b9b3b2dbab502105ccdd606f0c8213e1 SHA-1: 5355c10fe34329a287785c7068fce20f991c01a7 SHA-256: ed70dc45c16f89f17ae013b95c60d5bc6ae53e0baefefe934a418db378ae395b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users by directing them to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=soren+kierkegaard+either+or+amazon PDF link annotation
    • https://cdn.sqhk.co/bidogefapo/fTVSjcU/rokibutobejegowo.pdfIn PDF document text
    • http://sandwichhq.club/keppel_corp_annual_report_20151yl92.pdfIn PDF document text
    • http://yewes.fun/554762409601sejk.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/iifih7p/badri_film_songs_masstamilan.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/iiggieT/8342935671.pdfIn PDF document text
    • http://vedemali.22web.org/development_as_freedom_book.pdfIn PDF document text
    • http://usesucre.pro/wizards_and_warriors_nes_manualki24j.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/cggjbjh/54745487911.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/idyjfii/best_funny_ringtones_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/pjKigjf/tupekegade.pdfIn PDF document text
    • https://cdn.sqhk.co/dijexovesaf/jfGWQih/wipixataludadogapotajov.pdfIn PDF document text
    • https://cdn.sqhk.co/gudupixure/9hgCFib/carrier_services_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/WVVhjgh/bloons_td_6_wiki_druid.pdfIn PDF document text
    • https://cdn.sqhk.co/niduzabunu/gfjcf9a/anthony_brown_worth_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/eaRdw7U/37059644353.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/qjefhfP/26188806211.pdfIn PDF document text
    • http://pakisonuzaruwav.iblogger.org/gubedaloboxebufuzofuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/toradol_generic_form.pdfIn PDF document text
    • http://dokixogutezone.rf.gd/17953942102.pdfIn PDF document text
    • http://daxuwogeme.epizy.com/evangeline_poem_meter.pdfIn PDF document text
    • http://pikarofuwab.epizy.com/ave_maria_caccini_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/wenogebotat.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/98898848299.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/ameda_one_hand_manual_breast_pump.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 5248 bytes
SHA-256: 7a328eb53b7b1c8909ba48844d491b91ffadc231350f3f2d573d51b23219d976
font_01_sfnt_off00010dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD0 10964 bytes
SHA-256: 4a97237ddf29ba38e2d4dd2af3a40e7c52013d872c85474a5a739fc2bb6ccefc

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