Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ded38d5ac623744…

MALICIOUS

PDF

92.6 KB Created: 2021-09-05 20:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed5abfbfea062a1ed875cdbafec22724 SHA-1: 2b9b48cc7e9ed6bbe06fd75c61af0a7c96538d4d SHA-256: 1ded38d5ac623744f181d455d818959bf9097b3140728b28ba82d07eaf9dc748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bcac5c594e2---86865727675.pdf In PDF document text
    • https://hirurgija.me/files/2471659734.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210820014954.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/nonolalogajapit.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b771bf0bd0083a9c30303caec710a933/34934346792.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b32fda5d7d5---67442153544.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/95343589128.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304c5d5c47---92519419181.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6a57c8d74df9a5f796fe09feb134fe97/dataledewodenogav.pdfIn PDF document text
    • http://heizler.hu/files/file/mufelafasakijar.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/vaxafupevevukutav.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/46712261823.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/85005815377.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/68424179890.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/ranikorirasaxep.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/xerimegafafumejexamupej.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/a9eca8a6869b8dfc97d330250985348d/fizutirirazumutafikepigop.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b6ef28cc2---mazunu.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/buwimokajurufolom.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/i7jnkcoh4t45utomjtukg0njuf/23877424786.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/8c3icd89kptt12h4hqtuppvul3/26682379457.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae29e9324d4---95568450565.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85c15085c---42388397541.pdfIn PDF document text
    • http://cutskytools.com/d/files/faruxadubuzumujizolemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=canon+dpp+4+manual+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 16696 bytes
SHA-256: 78808fa55355f80104f03283223d8699075a1a40b8db878122d10b5a97421f66
font_01_sfnt_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 2232 bytes
SHA-256: b7f8508df8036e76473c710e3f35b391a4be9ba3f2caf03c46ca2c11c2350c48
font_02_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 10276 bytes
SHA-256: 7a19332260e5128aabc739649670b94e5b6f648a683f12dd48503b3169821a73
font_03_sfnt_off00011326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11326 22228 bytes
SHA-256: 22eb9205fa125c807d8d5d952dc38d13d067d4a181ddf3b06ec273bccb77d855
font_04_sfnt_off00014ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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