Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac6e88f72277884…

MALICIOUS

PDF

101.9 KB Created: 2021-09-01 17:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0e598b46dcd14f394ccb1b7d4484f69a SHA-1: a2958aacfe1db63f9278fcc63d14b1845952ce2f SHA-256: 9ac6e88f722778848e58e6faa63d96265cf157bd1b23a0ab2e776cc6b319d1f6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating phishing and trojan behavior. The document contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. While no scripts were extracted, the presence of numerous URLs, many hosted on potentially disposable domains or compromised sites, strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609d65381cb90---61626015200.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/6dfe1d58fbac83c173a9503eded55dcb/nuduzaguxexekime.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i21jpjr9gs13tg5c8ahb6u1h88/48429779786.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/deae7026f97eccb3fcf16d7f6e1e2911/78362142610.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/99806820843.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04fc05df15---pedodiwo.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/uj024i057losc5h4oa8b0j9o62/busuwodezizusirixowu.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a3dba7275---tisobopilexemirudonako.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/13576241398.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/92470227333.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/14705536203.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/kezubadarivime.pdfIn PDF document text
    • https://landbar.com/upload/files/sazotubafevonebuxow.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef9b51b15---96312676886.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4947b7beba---59904391340.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/b8e2107fa2a99e9fa7595c2e98327e54/zizavusimuzajigene.pdfIn PDF document text
    • http://koala-al.com/d/files/mirozaniruvumovoxowuzem.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d6acf17d9---68727772262.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/41145578407.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/43824986466.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/1ofmqvh8mouvdtt3gd5o87d3li/mapuraxeterovafuko.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/zimamo.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/katodidedugid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=janelle+wang+marriedPDF 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_off0001260d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260D 19552 bytes
SHA-256: 34f861dcade290c0318caaba1cfb6ccff43a49db081e873cb57fe8ba0a5adf80
font_01_sfnt_off00015952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15952 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17169 10280 bytes
SHA-256: e2cacec7f0eae2eac214e324019a7c83d17efe38883efbdbdc61258a1986a379

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