Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e3ecb1da6faf44…

MALICIOUS

PDF

67.8 KB Created: 2021-09-23 12:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 363c6f646147dd510f4e62d95de3c0c2 SHA-1: b4e7b1b7ff2bb584d5370f3df27b3b1adf5f085b SHA-256: 47e3ecb1da6faf446c82c626de454148f09c1f1c15ea7418952d7e7c4ce271e0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to trick users into clicking a hidden action trigger.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://alsultantrading.ae/userfiles/files/robododusugubet.pdf In PDF document text
    • http://vigova.vn/Images_upload/files/mezosipexukol.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/60717135169.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/kosalizifutozojopevex.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/7540119878.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/65554778313.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/xelowelanuwugetojazeka.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614084e03656c---85715940063.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/rokezajudunapik.pdfIn PDF document text
    • http://turnyras.lt/Files/file/54745524651.pdfIn PDF document text
    • http://dnepropress.net/files/file/bipubigugadunudarimanek.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614280fe1b2b6---69599628352.pdfIn PDF document text
    • https://nexusmediation.nl/files/91760974165.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/17585795408.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/nalakegivadenunibubodi.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/wapedilur.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210905081613_961w20.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613352cb86715---76796770850.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/gunefep.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7005dfa70ee8066dcd1a914e52ccd4ec/zubepobajulolij.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/64156152319.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091712471873499.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d6adc63b6f3869c1c725d88dfd86cc7c/67181351642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+to+do+with+composter+in+minecraftPDF 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_off0000ae6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 13892 bytes
SHA-256: e0092ff9fb5650d1138b368f173ee3c4d57349d70f54927f88844ce09f4f3472
font_02_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 10920 bytes
SHA-256: ae975ba41f540770b86e621b192e9a250d40f7ac64c645c0e55c25d450b9c35c