Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09b46fc1678a559…

MALICIOUS

PDF

68.5 KB Created: 2021-09-05 14:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 87418b18b098552b27a4b46c0a5ca88e SHA-1: 2441d2c5bdcccd4e605621f60cbae80493cfac7e SHA-256: e09b46fc1678a559f9c06144105d1f0c7529b54f75abfd7d06897d267311b2b3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an embedded JavaScript stream and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, but the heuristics indicate a screenshot lure designed to trick users into interacting with a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • 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 68 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://growyourmoney.in/userfiles/files/lotelalusevibosixelewod.pdf In PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/19881230853.pdfIn PDF document text
    • http://osayit.com/images/file/87973100335.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/mesibivun.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/pilopanozeduvubanemodabo.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9d120323a---degusevewutotivif.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b1958fef---96841912461.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/bolegax.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/vanixune.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/nafefazo.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/25215724783.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa34497ae---paropinepurekujekarub.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075db21479fa---77394062431.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/45377028810.pdfIn PDF document text
    • http://dentherapia.hu/files/file/50369364892.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7f52e58da3e81ece4b1b84ed1b1450cf/62638531152.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/tepadebakip.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ec692278---88116725948.pdfIn PDF document text
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/69000726959.pdfIn PDF document text
    • http://minerva-collection.net/files/files/22760136980.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b74c12c3418---32590692508.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/7027226831.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/aph61823dv888ulhafv9omkmk0/revosomifewiladegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=non+homogeneous+equation+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_off0000b10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10D 14028 bytes
SHA-256: e7193eab3a95a9911bd58f09fca9a90557bc15dbb4a4e60b3169eb446eb81301
font_01_sfnt_off0000d379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD379 11024 bytes
SHA-256: 39bd5bc038840dc0c0410e0565d6ad59693e9f416ed5bbe1767a5ca373fd9d3f
font_02_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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