Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afdd91693eecd3c…

MALICIOUS

PDF

88.0 KB Created: 2021-07-08 03:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0004f54b363ef15d2fc5f65a408f1b86 SHA-1: d53ede5b64c26d0f585477b36b896cceb9d1ceff SHA-256: 5afdd91693eecd3c49df42dde6e4d7888ed15c882a6100305a9d779b86d49de0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/7361a9d9d81f6bab23666875bc895109/kakizavozet.pdf In PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210706044951.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa05c9247---65541835619.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a231ea4e0d5---10684708323.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/nizufejo.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/82311552046.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/8845723ec7a6f8b7b2abc204454a36ae/terag.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/eae7e531fdc8fdbb4ab30534902773eb/82805166782.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/6p46v1j20012j9ck9c2jkmrjkp/vewumuvafimapugi.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072495fe4ac9---kaxidukaregufabaletutolek.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2f24d3f3ccb26c7c6818bff4061817de/siwawidanotulafenuwaxo.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/73cf4de740cb0feebf3c3009ced310e7/kezubuzafatikaxefejewan.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/b110256f6ed5c80ccaed891927705fa7/71457438382.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/03bc051c0e280e878582b55873b5e863/xisomepukidivekabub.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50a4a5f2f---kekojipetaresogim.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1622802723.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/vifarulidozul.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/rudogimanifurinujezavise.pdfIn PDF document text
    • https://vestol.bg/files/file/31646862859.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/dda7e0d3aa30fcbbd9b7e7c647472103/weloteraputosugozevep.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/58537197334.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/wowawiwogagomowo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/14c4a7266b987e695aec757a901ba6aa/zawameduxur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pulled+a+muscle+in+legPDF 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_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 16904 bytes
SHA-256: 2fd4da8f87e7aada7181daa59911d80248e7d182be0b5686763c6a62be97a9b7
font_01_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 10496 bytes
SHA-256: 31fb2aa9ec30cb477591764cc0d2c0df8c1cb2df980ca575584e6bfe1248f3d0
font_02_sfnt_off00013910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13910 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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