Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e6e0abe6205e78…

MALICIOUS

PDF

71.8 KB Created: 2021-07-16 17:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 35e46cc6b4b9247a2acd7db1272ba5d1 SHA-1: 63952efe02ca517208070be0c0a6d453a705ff7f SHA-256: 10e6e0abe6205e788d28381a5835eddcf8a44463acb4e24a4db7fc7aa8f495f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The heuristics indicate it functions as a link farm, likely directing users to malicious content or phishing pages. The embedded JavaScript is a common method for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3a935297---4548426308.pdf In PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/51359b6c4197e91f55916425b515e0ca/18897535133.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e0b9e8e4e---rowisiwipazasu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/kr7k8pnet5p5igq2pcpdnrhrqo/26435631881.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7c8ae05ceabf14be11995984f40593a6/49383628079.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3onvpg9sskbtlu3fouggnajuc0/51906768116.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa65d3f6e0---zabefojabulopujawa.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ec15178c3069620cc73c1de1ab0af34/35105882696.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/mipetobo.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/89262508328.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f96fa9df0f---27739136867.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/24746578966.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/05a7c8531f14e55bf5def4a2771810dc/55180158368.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/6044563184.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/monetekavoxun.pdfIn PDF document text
    • https://actor-conseil.com/files/file/sesediroxabafagixemag.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/bbe37c1bd1f70fd6af4c4847b717dfdc/44219493247.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/wisireseful.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/9335175843.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/kaxorujurojiza.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/xefodudanevawibovigujuj.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/3189606473.pdfIn PDF document text
    • http://fittbike.hu/files/file/fedapapubegosipawivoxuk.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021070808375873499.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/juf94166honooaphpujjngsld3/24590054978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dragon+ball+fusions+download+pcPDF 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_off0000b8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D7 10892 bytes
SHA-256: 9c3e754789a560423f04b75bed93cc5c055c9bfa52355d8fb5624fe265139f43
font_01_sfnt_off0000d1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 15612 bytes
SHA-256: 9924c6a769f66a0c5bb0815d887b3bb2c8f227bf2a7a869b54af8b4e3bdd2a4b