Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5ab17243558669…

MALICIOUS

PDF

92.3 KB Created: 2021-09-18 05:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b15df79cfade61a26733879c10bf2ebc SHA-1: 122c6b2b0d2e157494ebee27d72012b1e41104c5 SHA-256: 5e5ab172435586699641c20ca7ada03bae32441db6e49e05e79f271e2b4a9e03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised CMS upload directories or are part of link farms on disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to direct users to malicious sites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://oniceh.ru/uplcv?utm_term=the+checklist+manifesto+summary+pdf PDF link annotation
    • http://rfinshaat.az/userfiles/file/12859524499.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/jofavedimupetenijivif.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/635367560.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/samuzofeborelu.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161381f8c59681---90703167278.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164532b9fe---53864076406.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/nipuzaxakajafegabuda.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/rinobuxarutuzilefuno.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161436c84a52cc---32403564875.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/56778630996.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/96641542545.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161350dcba1769---migofatomuxixumejufapizos.pdfIn PDF document text
    • http://dolonchem.com/upload/files/nisorigufizimasivaz.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/murudojipokonodisok.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109140516512200.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/binofuranejoj.pdfIn PDF document text
    • http://dogable.de/userfiles/file/94267079819.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/zafobopiki.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/45da9b2bc488c7f464462b9ff1d2bc83/motelebonejekefedopujaxin.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/7660666219.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/0f8c18940a0294f920feb79bc4be48dd/pexukotaka.pdfIn PDF document text
    • https://thepainter.asia/upload/files/26542022572.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/lanim.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/26923525136.pdfIn PDF document text
    • 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_off000100da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 11152 bytes
SHA-256: caca8df7f0cedab085723b2d3e233000739c26e0fb4db6f7b13c90088c2228b8
font_02_sfnt_off000132d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D5 18780 bytes
SHA-256: d1e1da9af0fe52502b22ec7dae746a3eed88dd84a49313fa650de31e8e535b79

Open this report in the interactive analyzer, or submit your own file for analysis.