Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dde33bd58dc7a0…

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 17:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8643c516fa4058d059a8bf2225eac2a8 SHA-1: 01839b462ec1ec8abf1da983cc456b64d100ea58 SHA-256: e4dde33bd58dc7a09deddad0ddfb22e1ada732644ea7c87a3e33da84ad4e0787
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and numerous external URIs pointing to compromised or disposable hosting suggests an attempt to redirect the user to malicious content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8384503e66---56412351205.pdf In PDF document text
    • http://technoauto.jp/js/upload/files/64827160205.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ddbfdccbd---42838005415.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/xatafatasa.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/41209490462.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/fawawisoxa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aa15622b2---40797025335.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/sajegejataf.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/36106177588.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/63575069830.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/posajopijijipa.pdfIn PDF document text
    • http://unsersohn.ch/images/file/33257329998.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/dc0a8e78d4789ba743d6d2ba4a299f36/najowepogel.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/vuderexawazisired.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/85725893256.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/33184268583.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1a84e29d3---69812317162.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/35175429659.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/69351901954.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113667357ee8---36876742072.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/guvawizuxabazopoludeku.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f38b61438---55724825991.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/bomozarifufokadi.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5a1b587dee98fdf26d2438bd5edb0f07/suxuzadixitizubaxeko.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/3147489938.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611a912529dde---19708060816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=english+stories+with+urdu+translation+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_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 10944 bytes
SHA-256: 223679cf9c2b696a0b7928a204e126020e5bdd13f2f716092608fa42028e7670
font_01_sfnt_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 18668 bytes
SHA-256: 3413571a4369f508364aee67170a6437dc6f7b434b83d322fa25f5bea5d18a0a
font_02_sfnt_off00013a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.