Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fae48a71c32ea37…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 02:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6190b78aaf81921da4f414f89bc6abeb SHA-1: 2277df746c2a7e445233abf3c71f0a49d6393d7e SHA-256: 3fae48a71c32ea376be5452462487a59ba0252177c236af4afb711e210934ed4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. No scripts were extracted, but the overall structure and URL patterns point to a lure for downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/5e0272a39d6a236c1b309e8ac74f4c84/67450494305.pdf In PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bpvpsh8m6fohqrckqu4hpm0mfm/99094219963.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/zagegetujisabepunesesimiv.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf53a86acf---lisesiso.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/kivimi.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/51991580770.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9a079a88f2d22600f754c8b6f1606a34/86595872842.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/95126957389.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/57886282373.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/virosebolusud.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/32694897515.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607869c538e50---87720044787.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/vuzuvifoper.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a9722f3a2---pivutirasebum.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/97257406123.pdfIn PDF document text
    • http://hainfelderteich.at/81612376353.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/leloveweb.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/zinabubuvido.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/81172851641.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/abb3bb07ab090394307000534b60903f/90040277259.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/32442464805.pdfIn PDF document text
    • http://annabarons.lv/files/files/36735378914.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/9610555369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=casarett+%26+doull%27s+essentials+of+toxicology+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 18468 bytes
SHA-256: 470fa0a78c28da35d3f5d5793de217f92328f568a8e3d45756c1527c89c4bf29
font_02_sfnt_off0001150a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150A 2044 bytes
SHA-256: 97a693020a9c67c913fa5abf5d83a61848c846aa130c5182d8e66f233602b60d
font_03_sfnt_off00011e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 9764 bytes
SHA-256: ce0a957398b3b9135f659d70af376d3ace855f10cbb919e06ea06ada586cd311

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