Malicious PDF — malware analysis report

Static analysis result for SHA-256 07715f09cc1a3d23…

MALICIOUS

PDF

96.0 KB Created: 2021-07-05 07:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 348a960bd9314d36df78b358c3d7b8b8 SHA-1: 8f4b43304a217e51d873846ef5b68d32f106103c SHA-256: 07715f09cc1a3d2369da92b1376f5942fbb23ae146889b7e5ac101825d2f0f88
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or scam lure. The SE_PAYMENT_REDIRECT_LURE heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/4117d46c8eef72ca22f17c9cc8fba1b4/xegurisenepikuxapa.pdf In PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dg311hnnntg8gc0bchcufclk76/pevisataxowolewur.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/66905962453.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/463294476f54917e064f21acddf1432e/fijazi.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c4290269a36---nekadosipuwazibiwebap.pdfIn PDF document text
    • http://acril.ru/ufiles/files/4146822431.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6bf3def0f---mijefiza.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/mijilaxojabuzusaniw.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/fujarimetos.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/tukigitojesaw.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/5088695540.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c43e9ee8a5---wugufudixugeriwozulem.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/27417318984.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd3d4a7bd2---99247647240.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/65b902589e56faad3f5086d5cbb3d7ab/51686118789.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978b872e73d---95709465726.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608d07eee6015---6823028956.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/kokakonokosivovoxufadevaf.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///40281294298.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/15713479691.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/webekipubofejubufefo.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad8549a77---paxadigimuvowedu.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/39428020987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=get+more+free+instagram+followersPDF 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_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D12 17128 bytes
SHA-256: 1bd4bc6f10b9f17ac22416124a047945733f1f899cfebddfa6077b9a76d43266
font_02_sfnt_off000159f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F3 10684 bytes
SHA-256: a7d0b2bf7bec49be17b9cfc034676fbd77c1734e6addf6cb246686172d642653