Malicious PDF — malware analysis report

Static analysis result for SHA-256 d307e098fe10c9cd…

MALICIOUS

PDF

89.1 KB Created: 2021-07-04 21:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 501253851883b8071282ff6c58cc275c SHA-1: dc7270242a3cde54d3765f2837f6a419ce4ed6a3 SHA-256: d307e098fe10c9cdd16f4f61ef973fc4f874e3d635cfa03fc256ee42e418231d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or appear to be on disposable domains. This behavior is indicative of a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4af01cfffec1ab7a2aa92c7742016fc8/9472197916.pdf In PDF document text
    • http://cnzgks.com/userfiles/file///xebosuritewiwut.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c31240ad---mogidofezufam.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/wojimebosaxelegodado.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/vesolalikugozobaw.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/86aff1f308a533a527a59ca86fa3059e/26791100126.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/e4e56244c3c08b3e0c88614afc76787d/towadesabilajitinifuge.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/1442742200.pdfIn PDF document text
    • https://actor-conseil.com/files/file/lipasamikan.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718d2932da0---10112302320.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/90201342011.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/68605719947.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/91232230287.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/n3nvfeqhdjj71l5ltr09lnvjoa/xanijamuvonorad.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5549d8618---57542515044.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/72885ad64aa616ed832ee1b1841c96dc/sapiwisaxalumagokodixekaz.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/valafalelebopevutofe.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740a1717113---tizesebovomadenewogufu.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7ade318302eb26874f5d0a0f3a6d4655/dopedakariragazuz.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021619410535173.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/f68e2d0ab410217af0a718d2b3e69833/xusofugut.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/1ihl60t3a8pq36n22op9aikfq2/tafemu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910f5d8ab5e---bafekategabavomegezir.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/09f6c637214896b24ce2e415e256c3b4/rujixoxaxidexunuxivan.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/41aaaa6799c987cd8a754052a0e6ae3e/wogunomijox.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab8804b25d---85148674957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=a+riddle+with+answersPDF 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_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 10292 bytes
SHA-256: ada1f30514271a0c9fa2641b7a4326046508aeac1e7f347604d9e070c1dca5de
font_02_sfnt_off00012a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 17292 bytes
SHA-256: 0c1410b74d8aca20f40f84368a6ca52d7e644f1d2aace98d48caf3e32014f410

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