Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67a7ba3327e6fb8…

MALICIOUS

PDF

92.9 KB Created: 2021-07-24 04:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0a38898172e578d2b8c578d63a267dc SHA-1: 5e94b5441aa6bb6604dc35473797a754b6abc79a SHA-256: e67a7ba3327e6fb8ed1996a0c37e454e72d5b45ac3c169bc92072cc3f7b3286c
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 a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4483c240f5---taxedituvabexawopaz.pdf In PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210703_B3926A62DA8C511C.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/pijozasepijoviz.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/31hkim31j8c3s9l0spli8t3brh/70903565740.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5c0d166cb---xewenaninozukus.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/3e88e1ce5881dd9182ce01b068043c5e/bazibubututexu.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/fewutetuzojawu.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//2419923187.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609890ea41392---21196582954.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/96q9krbar6fvi4t3fgc57hcqnv/60296986816.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/34885868988.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2165700e07---85903432179.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6d2cd3bb4668971ee67e1d304ad8fe1d/pizawalabisukitozawek.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33ea7a751f---87553691615.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/filotosizo.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/10431012550.pdfIn PDF document text
    • https://mmszke.hu/files/file/xowesawovezozixigixaxosi.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/743da43bdadef0d681138174fd50cba4/fimivukakilufesagumoxewek.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/90244880767.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/gapobodabupiwelu.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/kasejo.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/mejuwunulukisonirax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=hersey+blanchard+model+examplePDF 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_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 10936 bytes
SHA-256: d2de9f0d855ff749653e32e0286a50579bf66c1f31918ec3354ef93cb00b89e7
font_01_sfnt_off00011edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 17880 bytes
SHA-256: b7598ed7a5fdcf534ddb82cad21713e2f2210567bc2221a66861e701310843c8
font_02_sfnt_off00014d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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