Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abf5fbdd99fbf2d…

MALICIOUS

PDF

90.8 KB Created: 2021-08-20 07:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ab3ccc6a467c3bf2469999f96537c53d SHA-1: d1110b2cf07a333b79bfe8159c393973202398ac SHA-256: 6abf5fbdd99fbf2d28e6c8aea495143ce1871f4ec1eadc832cead03ed4a2a4e8
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://aarogyamedico.com/userfiles/file/gekoxogaxorolifedaleg.pdf In PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/24f1ffa7837848f8e9e36b8ee6da3a63/dapizamulivoriperavoluk.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9dc10d97d5da75978ab46906dfcd58ad/litukirojadupujujironibiz.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/latirosunisevugalabeg.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161160e235542e---mopevunotikazejo.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/93649290123.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/jixonigularulitakidotes.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/73673886807.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/fa5c0c941f816ec2ba0e0cd2d8d614e9/47029718316.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a46e7acd4a8---60198792585.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/voxomusawifesikaremaku.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9168705936---fadokodizininoromuw.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/dps4cpedoutkdelpsm07pm9im6/xazuzemovubivijuwizeropu.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/39693800284.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/jokabiso.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/vj0o8fpfj0vu43jj5v9vuj9d7o/regasopiletuxamejineber.pdfIn PDF document text
    • http://20thhelicoptersquadronreunion.com/clients/71358/File/lidifuxalanirumuvajapoli.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/sikejerenajijodubiwuditiv.pdfIn PDF document text
    • http://ridendo.cz/files/file/85530782427.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/manidezoxujure.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/hfqj08rcubu488tuhgtc4p974m/65711502191.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0ff4bbb35---xogeveteti.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3ab4c6d8c---sovosofifijuvevumonina.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/p5gafukh3qmb24k177vre23r5b/gufajidi.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/50a8cfd1cc43f1a57ef74bbcad372c66/ludatetiriragibodufof.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/wogaritatajif.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/267gu85gufkpm9qat52pbufe8h/xagiwevevasabedumidit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=rane+62+el+capitan+driverPDF 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_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 17476 bytes
SHA-256: ffbe39dcae4b2bd40aa528ce4116cb828296be1871262ac5acb440efd79650b6
font_01_sfnt_off00012aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C1 10620 bytes
SHA-256: 9ab914a0ae2e8fe9c500a7929101382f1036dcf0e101023e638ab8ac9e21116a

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