Malicious PDF — malware analysis report

Static analysis result for SHA-256 18add9bbd0dbde47…

MALICIOUS

PDF

95.5 KB Created: 2021-04-07 04:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5e9898453824c11b39ecd902a63462ef SHA-1: 2b65ee96208b8a5f48cabee35cbc6e4db775dc82 SHA-256: 18add9bbd0dbde47f1c4bc5068d1e5d1fb877d6561047f23755fdce19fc8d267
146 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://botokaw.ru/wix?keyword=animal+jam+hack+no+human+verification+or+survey+2019', suggests a lure for game cheats or hacks, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://botokaw.ru/wix?keyword=animal+jam+hack+no+human+verification+or+survey+2019 PDF link annotation
    • http://avto-document.site/lg_front_load_washing_machine_drain_hose_installation6ybqp.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/rjid6if/6487810558.pdfIn PDF document text
    • http://podeves.xyz/duravetodizadofalwt4j.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/igdMhjr/riduvetawobuzolafegodip.pdfIn PDF document text
    • http://quickpapp.online/74695666729hlhfn.pdfIn PDF document text
    • http://drovazvenigorod.ru/50524760979xypwr.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/jvhfiec/carnival_games_ps4_vr_review.pdfIn PDF document text
    • http://idealica-uficiale.website/ridowokijopibujomibqh.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/qjbbgez/monilafajonamatagunukepu.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/cSgjhLj/asos_ski_jumpsuit_review.pdfIn PDF document text
    • http://rubka.space/dawukamaraar9ds.pdfIn PDF document text
    • http://dokumenty-kiev.online/how_to_prepare_cash_flow_statement_from_balance_sheet_and_income_statement_direct_methodf3diy.pdfIn PDF document text
    • http://muriwilosakud.iblogger.org/8426934651.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/bewibiwat/jowuruxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/49319826537.pdfIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_3e6942782ce34fdbab60dcc535fa9f19.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_efd83c614cb64302bcb2b8614fce03c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/tovidorerol.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_6cc34dc67cb94bb5a98a10b87bd57f0d.pdf?index=trueIn PDF document text
    • http://palalujopaxuv.epizy.com/lalisanadi.pdfIn PDF document text
    • http://tizesabukabel.rf.gd/tavokijenugasuja.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/fha_va_amendatory_clause_form.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/6850769239.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_off000133b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B8 5896 bytes
SHA-256: ab56bc67c0c43b2116f13f8574686a038cb2e15704ddb80d9080a06e34824341
font_01_sfnt_off000147b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B3 11908 bytes
SHA-256: 1734bc339518424110004fd109bf3e2964edf5eb5430247ac00cc1ecfecdd1d3