Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b6ac73e3228e95…

MALICIOUS

PDF

69.9 KB Created: 2021-05-28 18:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 184e7ac508a4f0c7fdad1983314eabb5 SHA-1: f2f2b249a8bf88957004b051037586781a32af10 SHA-256: e2b6ac73e3228e95d6e18fd7e50935710d1a77df3cdce2750c77c7d828645000
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of links pointing to various websites, many of which appear to be compromised WordPress installations. The document body, though heavily obfuscated, contains text related to downloading MP3 songs, suggesting a lure to trick users into clicking the malicious links. No scripts were extracted from this sample, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://medvor.ru/uplcv?utm_term=yaen+endral+un+pirantha+naal+mp3+song+download PDF link annotation
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/48b6fed3cffab64257c1ad35d4952e25/81245269204.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a46a2c9a9dd---52214981193.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/9a30f338146cfb99cdfd49586afac44a/73175658058.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/rkc3verddu6jnmecdki5qmfa4v/xigasok.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ef436085---lozatakusuj.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/betizomavozemiwufiwidaxe.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/192649164afc8bedf6ad9eead4b425bd/sipalesozisutoruzovaxero.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7c00a72fac0d732f4646edd39ae8baea/junizapiruwilow.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/374ba5e6031dde8992fcc3bf2ff8fc89/70705983371.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/58303454113.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/wataxubebenarodirow.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f70e86bfff---bilokivewokekos.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609af5fa6c721---bejukaroxozedipetat.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/icqge1u35alf5vfpc0ukmd806d/95536980676.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080653b3c8c1---12449210537.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/cc5b06459d0cbd0836b2fd0c17c4c4c6/16388786952.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/90754541673.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e90bc392d0---rulokosokitarowupozovafon.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea305497db---69597301897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 5472 bytes
SHA-256: 1f19ef3768011e9f903bb91b7e0eba8f3491573ecc6e9b351fdf2a537e1164b5
font_01_sfnt_off0000d9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CE 10084 bytes
SHA-256: e340b75a8e5b7636b729207e47a0ef82b2979391a267f01587c6481c78e44931
font_02_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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