Malicious PDF — malware analysis report

Static analysis result for SHA-256 4344e49dadc080fe…

MALICIOUS

PDF

72.5 KB Created: 2021-09-11 07:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f7d0b409c4853b520d281c2086d2b27c SHA-1: 675ba2c455a169e98c6f038de5b911a6ce8ac59b SHA-256: 4344e49dadc080fe26f98d61b93e11aca836f9af92255aa16df9be78b316f407
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further exploitation, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://movie2book.com/userfiles/file/xarasuvipemefadigovup.pdf In PDF document text
    • http://fiumevivo.it/userfiles/files/34560535357.pdfIn PDF document text
    • http://gist.adrianlechowicz.pl/userfiles/file/vedusanivezisalafa.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613058a92df39---jefufuxinurajafisoviwiko.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/52557121153.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/68808686002.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/47352767647.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9b29e6ec9cf1eceeabab572ad2a4e4f/vilikan.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/61316695362.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/pesawojado.pdfIn PDF document text
    • http://slsnn.ru/content/files/kexarupefujise.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/debovapejas.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/79613774895.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/78359812403.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/duzebaledopo.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202109050914236931.pdfIn PDF document text
    • http://popeyebio.com/upload/files/mokiwikisuten.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/ziguxezatizerid.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/5567250796.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/de96756e904608cfdcf2ba1a0760d3bb/zubulexega.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/relujivemix.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/kuliju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+beatles+wallpaper+for+androidPDF 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_off0000b777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8E 10784 bytes
SHA-256: ef4494977304bf90f6e88ef6366d255e43f9d836e89367669a65d7856a77cbc8
font_02_sfnt_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 17016 bytes
SHA-256: a72b47bf0080416d23cd3782e5951921dcd04951a0248bfd2811752e09b99952

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