Malicious PDF — malware analysis report

Static analysis result for SHA-256 262073bc69f785e2…

MALICIOUS

PDF

119.2 KB Created: 2021-07-21 13:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bc0835a3dd506e2bd676924d214b34c8 SHA-1: 9eaefc313c5372db2f4c5222376e89cebc43fc9a SHA-256: 262073bc69f785e249c984582d00dc1923586e664d990b2b301247afd80f5db0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs, some hosted on compromised CMS uploads. While no scripts were extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://ateliergermain.net/sites/default/files/file/82956533141.pdf In PDF document text
    • http://inglewood1968.com/clients/68690/File/fuwetozukedisapatapofi.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/javafitibidofibujajolip.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/84840890867.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eff7ec6e23b---40007992501.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbdafa37ddc---kefevivaxama.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/811c8b92263729bfee02fda7d335db9c/10807555681.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/87187971644.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210622002542_1774905495.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/kukemipufomovunir.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6ea153573---pitovogafivawisorag.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed993b20b06---zorajapu.pdfIn PDF document text
    • http://haileylusk.com/clients/e/e6/e6412a3df854040bfb282c4f37eddf02/File/nuxufepatekuka.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160917c806c122---23268495404.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6f7dc9bbf4c56ec1a990c28c3b06fdab/47873458845.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/q28574qq4ugjbh2ncb2smq8h30/591917202.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/2021411949.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/kajusozafezimemajune.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c0b3d39f4---maxurabazoputo.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/bawuzibetukifexutalo.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/908864698b106c2447eb92e4840479f8/92210997902.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/fr35i53l93lv3vcsusork9884k/fobewepadexibukanavokafur.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/melowitebodere.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/1a8e923771a3a3d72b89772d2f56df49/92046384960.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/69dcjbo6qsfhg08g0khta0all7/xozorabapuxajo.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/fobegiwowotunoxuwipifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=minecraft+java+edition+download+apk+androidPDF 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_off00017098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17098 16216 bytes
SHA-256: 21ab7d523cc7386e0a98401a29ac235e6fcd68f3a7b66bd48ee9f7b3c0c2bb7b
font_01_sfnt_off00019acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ACD 10812 bytes
SHA-256: fb7d50b5e433ebcc337163399bd0e81a07cd15eef40f395de740949b7f464762
font_02_sfnt_off0001b3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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