Malicious PDF — malware analysis report

Static analysis result for SHA-256 854d3c62a603d0cd…

MALICIOUS

PDF

86.7 KB Created: 2021-07-12 23:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9e1b931326dad0374ebd297c3a86c141 SHA-1: 19de8509a48a53b437b5657e62a5f9c3d35cc08a SHA-256: 854d3c62a603d0cd3c626fbb08fb4cdc1a3095922c41d51d24bd5960001f4b00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple distinct hosts, some of which are compromised CMS uploads. The embedded URLs suggest a phishing or redirection scheme, likely intended to lead users to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://landbondcorten.com/attachment/file/31055014bedd19d6ceb6894fed835feb.pdf In PDF document text
    • https://canevastoilestjean.com/upload/editor/file/52961755634.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/i7rsbdi9mqpms1ggjteo7i73dd/1167463830.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/29880235107.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d147cc7b43a34baaa92abc5b69621373/lafalafivifavudesuz.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/kavedaxok.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16079c7d51cf71---12247072082.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/sinejenir.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ufrq6uptid6i4b80vhm1dr7ns6/zagevoxamaloma.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608752ac66b13---wuvejigofewurevenerov.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-28/20210628125430854075.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/56351501673.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b9e2495---39921002162.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ias6sp3u51a1g3oded1jd788n3/baxobalaxofo.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa6ae1e10b---vunogovoxasexokuloxokidur.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/dapip.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/66548835898.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/nufabamuvuvugum.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/99602296482.pdfIn PDF document text
    • https://le27.fr/docs/file/mizigole.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73eaf33519---87099714323.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8769c4866c---serufogekopibadenepudag.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/69003698813.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a29c7b074---dipiwobe.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9251123854---gadego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+you+change+your+name+in+fortnite+on+mobilePDF 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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 17184 bytes
SHA-256: 36c47f5b37cac50ee28da006ef4b9f0ad2a1f9f54ff31afcabf7f4be7bd0894b
font_02_sfnt_off00013346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13346 11184 bytes
SHA-256: d856577330a7fdfbebf1aa17670314e82508b61adb204ca6546e370f1bcf18f0