Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aa0d6a7804cb6e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-05 02:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 668cffad2f723e579568f25cfb7fc285 SHA-1: 36fba6b852dce19b9ca820c4f73ec4f9cc06e931 SHA-256: 06aa0d6a7804cb6eedb3d478b2b485a288ebc42c3827846f50aaa49e88f66ff0
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. The file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary attack pattern involves directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/28820225053.pdf In PDF document text
    • http://asfalon.com/__files/file/lomezofolibalibotuxevuw.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a225b96b5ee---tidudivukadesapi.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/numokusozoguvinej.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3bb8d070b37bc6e6d1a04286728940c3/bodesoxukanijoxa.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/49dd390e9e3ca380d3a1f9d6033c459e/85511884943.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca42c41eca---62634363306.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/tafiwonekenugemolawe.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/texopulamedobipupomo.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/wowibozotiwe.pdfIn PDF document text
    • http://atek-ent.com/upload/file/wumujinasukepibepikiwib.pdfIn PDF document text
    • http://luatsubienhoa.com/upload/ck/files/95376861368.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/mimosopujuwuzofemo.pdfIn PDF document text
    • https://moolans.com/uploads/files/wutazoranalefuzuwirenox.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f93eedb79---pororikiwuroworazoz.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/palewol.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/32192187509.pdfIn PDF document text
    • https://penal-garazh.ru/files/dokifulux.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/palod.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/midonoxe.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b66919ee---73107078381.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/32929512032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dimensional+analysis+problems+with+answers+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 19600 bytes
SHA-256: 63fa5bf8393b16acc4ee10ff76705fbf60d71cce266cf6f9e27031eb78694701
font_01_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 11104 bytes
SHA-256: ca0e217f84d2e50234f26364424516fb56e2cd1a5a2f833fe3aa3252dfb42e33

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