Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba8eb3db2a5c41c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 20:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 790257fd4e1d4fc61d04bb45b8a5b5be SHA-1: 151df22950ac4f29c7a05249ab7340501c686d87 SHA-256: aba8eb3db2a5c41c4f4021cb75f7a60d2d704382b160be3a4d5a19284cbf6663
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wfbulgaria.com/uploads/wysiwyg/files/dofuxudevigapemi.pdf In PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/simexajopufiseraxe.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/47439869614.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/fanofaf.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/0pjvr64du9m6uln8sl7kd16l91/7252635634.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/o0g35ak5bifcoqm0dtb7pnrh35/sokexejojivifujodajatamin.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/2569998595.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/43d8e59d86de2b09d4a9b7b3300612cb/busiwanadivun.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/bojatigupogovupoxo.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/31113984521.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/zadejaxizadojilod.pdfIn PDF document text
    • https://istanajp.com/contents/files/70618765855.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/75586443743.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ced2fcf52d---tetife.pdfPDF link annotation
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66863b20df---12709617635.pdfIn PDF document text
    • http://glcore.net/ckfinder/userfiles/files/wizaburusopuvaralosetu.pdfIn PDF document text
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/levebebijosofezagoros.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/rononelezanedemoneva.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/netovipavisiv.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071f8be56f80---28707439930.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/fesoxezikinimom.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/mefojitanagovunava.pdfIn PDF document text
    • http://gdgom.com/upload/file/210815193534773479s2wjxrjmdj6o.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/344fcdcc54ade48e82def195d211f18b/8661286855.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/jonakozodavuzovawijin.pdfIn PDF document text
    • http://labonscafe.com/userfiles/33328405639.pdfIn PDF document text
    • https://miet.hu/kepek/10786004475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=bad+boys+for+life+full+free+moviePDF 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_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 17516 bytes
SHA-256: beead624be70401408f73961641066e9147da35e7ed4959539fbfc81faf74caa
font_01_sfnt_off0001171a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171A 10784 bytes
SHA-256: 44d3b13761494a5916b2d74bfe19d6a8f0bdd15301dc6cfe4d13e16dc5787d0d
font_02_sfnt_off00013002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1