Malicious PDF — malware analysis report

Static analysis result for SHA-256 178d3727a5f9adf1…

MALICIOUS

PDF

78.7 KB Created: 2021-09-21 01:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b7ad18ceea142bbb401b7bc31d402335 SHA-1: 25ab1b252bf969214a47d542b8708ac121b3eb95 SHA-256: 178d3727a5f9adf1a5c593eb102636773f23c8d59938b89ad1b1a9ac5055ba17
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as a phishing trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF also includes a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to obscure the ultimate destination of malicious payloads or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • 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 http://contelex.it/userfiles/files/27297172182.pdf In PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/91126994764.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/19471296827.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/reseni.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613e478bd2541---11901171728.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2dacaa70fcc3d34393d4468ead05ec96/robabap.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/1136903150.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/sulamar.pdfIn PDF document text
    • https://rajakedua.com/contents/files/jekojuvesasane.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/79654505257.pdfIn PDF document text
    • https://rm-parketi.si/uploads/39888153469.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d26891a2---vetir.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/wepafakagumijajumo.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/37152472569.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109201642127389.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/rexorateledodulonu.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/78884692492.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16147e808cc373---97586112076.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/vidaremebojukeletav.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/76986134900.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021091818130473499.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/24553897876.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/61960010388.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161353bdfa6ff0---darijek.pdfIn PDF document text
    • https://eltdb.com/UserFiles/files/98838067965.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b7e00a038740871b1583f92a051fe873/55670679850.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/87577882048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=plant+vs+zombies+mac+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7A 17408 bytes
SHA-256: 4fcc66f88aace8988dca56084a26a7c59be2233d68e0789ed1bd0b573627df61
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 10784 bytes
SHA-256: b5ab6d3d66bffab6567fc62b8f99afca9a9cb4bcf897580990045a6cf90ec14e
font_02_sfnt_off000114c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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