Malicious PDF — malware analysis report

Static analysis result for SHA-256 d973d5d7f53edd86…

MALICIOUS

PDF

87.3 KB Created: 2021-04-03 04:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0a1d14e79dd553b10be9958cd67a89e6 SHA-1: 23f618e4ae003a14b7a611818c7fd632942394bf SHA-256: d973d5d7f53edd862bc3544f1a3fb30692d05e33345e1516679dfb34a28d66d8
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=percy+jackson+and+the+last+olympian+pdf+google+docs PDF link annotation
    • https://cdn.sqhk.co/jabisopomuxo/inPhbco/hill_climb_car_racing_2_online_play_plonga.pdfIn PDF document text
    • https://xujokutiw.weebly.com/uploads/1/3/4/7/134749543/6698642479f843.pdfIn PDF document text
    • https://nifatukipukixe.weebly.com/uploads/1/3/1/3/131398430/repamefel.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/djahjgo/xibunimirizedime.pdfIn PDF document text
    • https://vipavogezeguw.weebly.com/uploads/1/3/1/0/131069860/2190dcda.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/oilLM8q/made_in_china_2025_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_6056fa44ba2c5.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/2398415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_6052a94715a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6017ddaa5a5a6.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/eNgfjby/bomb_hunters_tv_show.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/ajdMEgd/war_theme_music_ringtone_download.pdfIn PDF document text
    • http://jakartapro.xyz/sony_rx100_vi_full_specsydqmf.pdfIn PDF document text
    • http://leaninrzpd.site/perception_in_artificial_intelligence_for_beginnersgeucf.pdfIn PDF document text
    • https://firulasimasib.weebly.com/uploads/1/3/0/9/130969438/lurep-salasixesula-tegiweromorijo-duvosenujenex.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/87iaogj/lovonureki.pdfIn PDF document text
    • http://zitulexe.iblogger.org/vexumumugekodevowanevow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fubegamo.epizy.com/boulder_retaining_wall_design_guide.pdfIn PDF document text
    • http://lokemupuwife.rf.gd/pawejirapiwol.pdfIn PDF document text
    • http://ravuxigud.epizy.com/pivosiketonopubesajo.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/betafefa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 5600 bytes
SHA-256: b88920e84291535428acb426beececf485217d4c631576046499ae6668e2b862
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 14752 bytes
SHA-256: e73bb2ff695e538a92a06c10fab8e8a5c34a96cbc3f47da6ce1c19b63b9f4891
font_02_sfnt_off00012bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCE 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off000140fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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