Malicious PDF — malware analysis report

Static analysis result for SHA-256 690fd1308b2febaa…

MALICIOUS

PDF

79.5 KB Created: 2021-02-15 20:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: db1efaa51a635fd062db6d97c6bbb63f SHA-1: 266e797fcc3f28ece3ff22bd09c6d9cafe9c7f8d SHA-256: 690fd1308b2febaa7694e3796f1c9da4c89fc68e63e6475ef872da3918e7112b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the document's structure and embedded URLs point towards a lure to download further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=garmin+nuvi+1390t+aktualizace+map PDF link annotation
    • https://cdn.sqhk.co/koroxofusino/vhczgfm/53866046668.pdfIn PDF document text
    • http://nivekux.iblogger.org/91265939546.pdfIn PDF document text
    • http://fridgeservice.ru/romezivetumushcu7w.pdfIn PDF document text
    • http://hdvideo.design/skyrim_best_fortify_enchanting_potionho023.pdfIn PDF document text
    • http://com-signto2.xyz/88322935740pk501.pdfIn PDF document text
    • http://tiktokfrance.fun/keto_diet_plan_excel_sheet2kv72.pdfIn PDF document text
    • http://vuvuga.xyz/maquinas_electricas_guru_descargarad28v.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/70102475080rcxjx.pdfIn PDF document text
    • http://itnegozio.info/fofebodemegen9dra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6018b17bb9943.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hhpO2GX/zomafowefolibida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_600562c22444c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_601ba89b5225f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_600f028fb554e.pdfIn PDF document text
    • http://salebox.shop/www_k12reader_com_answersgnvkl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pemowepog.rf.gd/bamigitogimawinitegej.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/canon_ae-_1_program_repair_manual.pdfIn PDF document text
    • http://pavebutom.epizy.com/job_application_letter_format_bd.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_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 5620 bytes
SHA-256: 2f70ae32d69aa4a7c85dfaf00f4cf3bcc52d45cedee59e2120ef6c94f2e0a71d
font_01_sfnt_off00010a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A04 12016 bytes
SHA-256: aea3ee777b7ac11d7c52d25b74bba0f56a3bd4ffce14a38d9a9af9628fb5e433

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