Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc63b80fbde928f…

MALICIOUS

PDF

94.1 KB Created: 2021-06-26 14:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4977ef2e01c023b2889e0b9cc9022226 SHA-1: f00bf436427edfc8525961ce7282f4f979672b1d SHA-256: 5bc63b80fbde928fbfed4997099ec38e0dab2ae9c5d4e716a1a65c9323419b74
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, forming a link farm. This suggests the primary purpose is to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=interactive+button+indesign PDF link annotation
    • https://bruceautoservice.com/files/file/volefopuxulotulonemiwa.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/73558933887.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/60941d0rs401guflrp43de328i/lomawomozerazifupiv.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/xukidejep.pdfIn PDF document text
    • https://cristalensi.com/public/File/bosudatisexad.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/1248ee892ece93def0167b2999559976/rijuduzovakowekefekel.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf4bb51c27a35e4a94637cf604987625/tanaxajetelipup.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/44308668378.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/drr4lacgf8qsjce9djsidj2fm4/69155992335.pdfIn PDF document text
    • http://hnspkjx.com/d/files/36990519505.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/vodulumewibesegimoxilabur.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817e891f32f---gagaliru.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fe06e30e4---91633457352.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9dd6a2ac291bcbe027c2356f8b2cbacd/27701447283.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/754bc5847e4c43c6a6f38484ecee5d1d/sinorupoxiwepemabojiten.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d867117c7f---xutizejuvato.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ff76f1d17---mewabujibizopi.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210626_082509.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ma1eprorocvkosp0jmd8knc2g7/39502268415.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16086f35272773---32175974831.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608bcb16dc169---tajisosebosajatenoxupi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69f0228bb---10965810053.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/kden89mcsc8sncr86r7rjqsde1/9928764280.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/qq49e1mb6u521q7i688pfhrvhd/gopolaxonazabuzalo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fd20b086---gebuniwosova.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48c377613---93674769744.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/44961852417.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 16744 bytes
SHA-256: cebb301262b3bdf29b2b734177fcea5e1ce8da97b0d87d08451d6f88d52695f5
font_01_sfnt_off00013a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15258 10756 bytes
SHA-256: dbe16aa50e74e2b11dae10e7a3294f6c05187ce3105ce880b0819f9b7178afaf

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