Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d9dc54edb565d3…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 04:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f9f1ce583087cc11257248493fb5c6da SHA-1: a513e40e1e27d2a16eba11d477c2a3df2dd73513 SHA-256: f5d9dc54edb565d33119d997052fa792749a9dd6025f3a8e358044e6e1da994a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://queure.ru/uplcv?utm_term=nf+when+i+grow+up PDF link annotation
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/kchctp78hqubp90uqtntptuhb0/xetubomisero.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/ritijujavogujize.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160abd0fde3a43---jajugezoxerezup.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/79a9f713dc2ced14a161febef53d229c/worozifis.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/24432281301.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c58f74a7e---22511466521.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bcd69318d---nakisoluvipuvogixo.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/2423179342.pdfIn PDF document text
    • http://adveotec.com/img/file/37280193505.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/86097279839.pdfIn PDF document text
    • https://ewt.cz/res/file/50673110816.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/5ab242a76c0b1e11fb7bf1f91c1334ca/lexagileg.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b8e6f3667---zamexesoxigekuvikodam.pdfIn PDF document text
    • http://vhktn.at/images/content/files/56135932309.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc3b7aeba---nefidedapoxunima.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16076599c7c578---11577924228.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/batom.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/g5ig8vti59d4kt48qu3o0i43if/nikubabunofomeduwekimosor.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/rv5gt1ordd30pc5g80h9su0jk6/49792627364.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/2e2fcf0213bfc75adba90987b21129b3/ramivejaposulekerosiruvi.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/pelevizisusemeru.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/83607980011.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/rixotodar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 17648 bytes
SHA-256: f85c3115bfe78df4f06d7cb7cbbf04966b7d9c74d2d757eede41441ca06e5873
font_01_sfnt_off00011d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D77 10328 bytes
SHA-256: dd4e52916f4d022c15359c4a9360d05e627799ad4095bc4cb62338a012a415f8
font_02_sfnt_off000134b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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