Malicious PDF — malware analysis report

Static analysis result for SHA-256 c332d55167029065…

MALICIOUS

PDF

83.4 KB Created: 2021-08-28 12:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f71d7deca91f574f1e0f9819ff38c72f SHA-1: 532970b051e15c6480ca78442d2b17903335ba9a SHA-256: c332d55167029065814c75737cdb7de13f0ec35b4729a88996aeffae233426fd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish for information. The embedded URLs are likely part of a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • 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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5a094d49ca9f8a15b4252ddb79b6da7f/12021021660.pdf In PDF document text
    • https://iamtimeshare.com/userfiles/file/rabatedimufopadulofuz.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/miviximixezurunutoxamil.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/60331220594.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/genunagavafijaxerupup.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0eb277f836ebae29d26a884fdfaf7510/vazedorog.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c54f32aa5a---15038396527.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8b86628ab28cb15068e8f62049fe00d/96394663933.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da754bad785---95784990714.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/nukozimunewenisukuvifu.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/kimojawir.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/26588596155.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e656fafa5a60dfb3c0098964fad168a2/88321345572.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/gadelefijuvevus.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/64375671341.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/292b700gbdppp7qmsraf8fk4ng/85400537207.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/74580500682.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/juvole.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/qoopi6m31opvo914ve4dhtihiq/37694192988.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/67387132475.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/vajitomuroxugidowabejel.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901cbdc9c62---17995180930.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/sevewebipuvamutudinup.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb74842f4b---gubevofukivajokudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+much+does+quantiferon+tb+test+costPDF link annotation
    • 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_off0000dc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 11160 bytes
SHA-256: b74523da53a1ba49cd820279dbd7383dcba9a394adcae1bfb45ef9379fb6e58b
font_02_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 18768 bytes
SHA-256: 707b7da2973123e9a0df6a54d02e14e35ee3103babe8111ef0ccb944d62f4652

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