Malicious PDF — malware analysis report

Static analysis result for SHA-256 310aec2fdb3ba0e6…

MALICIOUS

PDF

90.6 KB Created: 2021-08-08 19:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d830794b31ffb9bc0a85c257030c485 SHA-1: 2eadc86089890f67f173ed3c03b640cf7b1b41c0 SHA-256: 310aec2fdb3ba0e612ede203558c6e1998e72c6dee6cc58a365272dcac5c3638
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads, forming a link farm. These links likely serve to redirect users to malicious sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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 https://menuiserie-sainte-anne.fr/userfiles/file/vegeworo.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/46a96b90ddee59453a88fc4bc70faea5/ximego.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2bf24344b---vatikinezusukupiwokatazu.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083a018242b6---83763556652.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/19b235b255f65f2448f110534b34e235/fuposizivujiwelefiwemage.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/38758569532.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/58590798704.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/66065032202.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/xexefozigadovenasasato.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085297760b4a---vaxov.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff48ed57d---51184713689.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/dasodikit.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/98529086117.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a9332a3344eeb5fb882e2e0b290b3917/16677037041.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0a54a959eed128e820ec939db15f6531/makofugelexebilolinedil.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/jumamapugon.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/18553585718.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/bfc2fef20df463fa89a27ed51a3b4363/26688368069.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e25c23f326ff3ea40de3a852e3c32d64/mekuvasafetovepuxoze.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868ddeda1be---83841528638.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80ae967c2b---11610834093.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb0f3b70b7---59748646409.pdfIn PDF document text
    • https://eventaipei.com/upload/files/xupumuvurutixegonegavupi.pdfIn PDF document text
    • http://beta-rc.com/upload/files/dilomokirilonofomegosex.pdfIn PDF document text
    • http://www.bash.cl/media/file/33890396767.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/78368924452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+turn+off+double+sided+printing+on+mac+2020PDF 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_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 18272 bytes
SHA-256: 484d1538f10ea2880face4440b0cefa52217c9a5946537c0005f44e4b83b0725
font_01_sfnt_off000127e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFB 11520 bytes
SHA-256: c57765c2b66c49e400cae89f5d2c376abc52330a167bb8c39c60141e9e8f47e6