Malicious PDF — malware analysis report

Static analysis result for SHA-256 00408ad2fc6f1574…

MALICIOUS

PDF

104.1 KB Created: 2021-07-27 21:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7fa1ee8b0fe31dd7f173885fa82550a7 SHA-1: 7a68e9f4ecd76e0697034c099c1cff79fd2f7fe2 SHA-256: 00408ad2fc6f15741d79a64442e2fcefa0ca32fafb7ba77679c211d7360ac05b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload storage locations and disposable hosting domains, likely to serve malicious payloads. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://teknis.it/userfiles/files/birowoxad.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af72d1550f3---63917408165.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/xotujebemakuw.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67fccb8ead---diniberosunibisizew.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f689520d04---feximinerab.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/22196216762.pdfIn PDF document text
    • https://bataretak.com/img/files/file/71388262281.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/21132969775.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/vifilopupu.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d207698fb1c1ba55250ce67967625bb/79901890798.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a15750409---62744321875.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/61a700faf5348b060daa4319ecb48708/ziboxowitokekevobediri.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8f9da7719---xotixizelakanosuvafo.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/81820592986.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/vc1o01lqi5nf6oae376q76kdj6/zubaziruzefaxoxibib.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096794c4d92c---bupasugeveboge.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/nopod.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ac88424a6592e8ac956da22295e2a610/pezetinilaxaro.pdfIn PDF document text
    • https://digireg.it/upload/nesaxi.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/panoratavemetiwidoponoxoz.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/mijifumamapuxesupala.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/jigenip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=biblical+good+morning+quotes+and+imagesPDF 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_off00013243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A55 17720 bytes
SHA-256: ef120fa318b0bc60563a6f5eeefafb7edd30278247eceae6d70d076455eaa662
font_02_sfnt_off000178bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178BC 11152 bytes
SHA-256: 1bd0bd7f5744b21fcd51dd465a407553ab68ba9ec44fd11dcfad7b5d469070cc

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