Malicious PDF — malware analysis report

Static analysis result for SHA-256 026ee657a87b5cbb…

MALICIOUS

PDF

72.9 KB Created: 2021-09-07 02:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8a3783b13be8c1936650f07fbded6303 SHA-1: 2a7212e905a120e023b7e2198b315e601aab6799 SHA-256: 026ee657a87b5cbb7b99786a78529991ffe69452f7e1e085f5fd23cdda5e2190
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL distribution strongly indicate a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://smidgel.ru/uplcv?utm_term=documents+against+acceptance+pdf PDF link annotation
    • https://e-ceramika.pl/userfiles/file/7960238420.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/94454515034.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/23153701781.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/gakizuwixozuxubonu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac805b29c8d---soxit.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc96eacbe1---jobivo.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/83899a286f1d6338451a66e0a1a1e14d/30802320535.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608034e55931b---34372564208.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/jabakegaliv.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/26670269989.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/jojaretawibunodav.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/lobufugavomidufapopexozup.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/31947591538.pdfIn PDF document text
    • https://biocoils.com/img/file/rodow.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/10392461222.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/248355031.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e6778d61---pufibizejexorinoleragi.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/duxakamaz.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/3lrerk933vgg3t5ou0fuh760q0/35102840821.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c1ac3737610c2216b5bb98294dfea35b/67236333382.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/bhte653vreboql1bp6t045sirl/99439009054.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/6744121053.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/0cba9aa479ed934af1a24ae6cc1f11c6.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/135659cdd4f56cb2dddd975f27f02db6/95797403722.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/79eea4853353e305dfbd999235c36300/76677107127.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/paxumosurokelikevisus.pdfIn 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://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_off0000bd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1A 15716 bytes
SHA-256: 8126113e37154573d6ccd69f94ae74387fb97c650538a809ada7d9ff6c17e821
font_01_sfnt_off0000e49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 10916 bytes
SHA-256: 883a2995029c3879dcf4e57186f8aa4c0443fcdf157a03930eb723de38ddc589

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