Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec20091461897e30…

MALICIOUS

PDF

83.9 KB Created: 2021-07-03 03:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e7bbb7ce330d8162d72db72b5b46bd96 SHA-1: cf658868a214d59ab234239bd5665c46046fd46b SHA-256: ec20091461897e306aeec5899af9c219b5232d6079dc8da13e5eb30c4e2f91f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://karapinarinsaat.net/userfiles/upload/file/fewuwipupidomake.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/50960655781.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/jefifonik.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c3f38d50e---82417314935.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/96c5452a735e08fb0333d62733708728/fafuto.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/wuvesinenem.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd7889024---89061099834.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1f2812cc7---jamiwobovud.pdfIn PDF document text
    • http://amdind.com/userfiles/file/25452738954.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79c01c79ca---fizukusizixefajutakobirak.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a47b217dcc889123bfd97599f588f96f/bejaxaporatavufefetowulig.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/64090655925.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/fafaxizujerakesowuwum.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/muxituma.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/firukelilojimunoze.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/movagisuw.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/segafarunopamirarozes.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210623/file/16244449936901.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1594a94b---saranunetubekejitolaka.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/soriwumisowame.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091de140a723---fisesuzedojilub.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/bdcfc2cebb5f9d117140d9c0d313a3cd/wumezija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=aromatic+compounds+notes+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_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 16844 bytes
SHA-256: e18dcab8fb2af162f36045a20cae4a9dc1827f0dc0b7b4afc89c4d6ecf43adb1
font_02_sfnt_off00012995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12995 10816 bytes
SHA-256: b87ddabe5df45f0778af00563ba0ba2f865d073216d06034a720949ea11544e1

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