Malicious PDF — malware analysis report

Static analysis result for SHA-256 368e3929efa6152d…

MALICIOUS

PDF

96.1 KB Created: 2021-06-28 02:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 664a24cd1801ba09c74066348e8f20e4 SHA-1: 8c6b694b04b1d035b9d34a653019b6b8df472ff3 SHA-256: 368e3929efa6152dbf3cd8c066dae3cb92933fcc3f4e3a445e26e4c5fc5effd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of many external URIs suggests a role in delivering secondary payloads or facilitating phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://queure.ru/uplcv?utm_term=odell+montage+variety+pack+2020 PDF link annotation
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/76ce17cfa5c72d150ece256eec864103/jalozobavewedepipajit.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/29685261879.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/32468412945.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077907b01a95---96061367950.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/9fd21bbcd8c0114a8531719ff525c361/zusirivenuvomuxug.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8384c540f7---zelojojimalik.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160983c43d992f---kikanojo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a06250545bbb1d7b37f42d4e6cebc2e/kepoxesomeban.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/manaxez.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/436bb5c6a6606dac3ecbba139dd692fc/taxananumexu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a75d74c27---34022225597.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c2f6f4267c61900e35fa37071af02ced/tajokekegoxitug.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa667536e37---fawasigisesukogiliserif.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6e6b790e---86817240975.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16081f70252ee5---wubogirokanuzenoxeses.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/763f8c84d1dbe5d97e7c5489d75c2359/bopun.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/87378640167.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47uffi02i9v6ivdjsu5m5595v3/wiwefutezixegotuvigurago.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/29989421787.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a2e2d670b---22117563324.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/98783406722.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf62703c0f2---xemisuj.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609091141e57d---gagajasebebupaj.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088abe8b1dbc---63057673167.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_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 11228 bytes
SHA-256: 23b391db39eb54a662d351409149bf73615f84a5d3b83976aaebf4ad4ea50f0f
font_01_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 18048 bytes
SHA-256: 48aff0aa731caed3f033789dfd7e052187c4c596512d91286c9171f9324b86be
font_02_sfnt_off00015b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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