Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac643938919b9e5…

MALICIOUS

PDF

247.3 KB Created: 2021-06-29 18:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d30c2b5a84723ad3fe5991b540f7ef09 SHA-1: ce3f3b496495eea1154e0e44aa4a531e307c3614 SHA-256: 2ac643938919b9e5bdce24fa3a9b87606bae761f7687cf70d42cdea26e55585c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a link farm pointing to compromised WordPress upload storage. The presence of multiple embedded URLs, some leading to potentially compromised sites, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and the nature of the URLs indicate a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • 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.
  • 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://bharatbiodiesel.com/userfiles/file/83100894181.pdf In PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840977a3b7d---luzomitalonukugigomozulu.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a57aef1b9b0---gazodifagovozinugowofusoz.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/pmut82r766crmg64ffddfp0m2q/18260279593.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e9891acc0ba0515d4819391203a84b3f/43074302292.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/wavutadovobexamagifow.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e67692df17---goranu.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/e28105199f7d08102990bd24a3b3e411/zoxedupudiwokifotepozor.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/vitazurosapi.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/rixafukapipibegov.pdfIn PDF document text
    • http://polletnv.be/uploads/files/51182442871.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/b3a012f1043b56c42a1a36c53c90c382/dazaxadajezapi.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/dipizolipelajezi.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/lupefuvirabogexanuf.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/90828358389.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da59d3bf97---webanajemudopexi.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/93jfi6431vmp50j1gmkm76tp1p/wofosikikukisuk.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/49437076442.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5bf0291de---wesotapunoji.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c112910472---76711716210.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eedd9feaf---nutinunareriwixiz.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e4967dce8---62679886958.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qnc3d0spmcpfnd01k1ffavc5qp/rabugumuzewigasude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=where+did+the+wright+brothers+fly+their+planePDF 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_off00035a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A5A 23036 bytes
SHA-256: bbdf6befba3a0cc8b7fc7decf3529d151b74d8ca80717750260d68cce696b6c3
font_01_sfnt_off00039362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003ab6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AB6F 2456 bytes
SHA-256: 78b7ace72f1c7de5eff2c7c0e17d649d5acbe7759f3a91399f0e40c1a75dd85e
font_03_sfnt_off0003b609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B609 11112 bytes
SHA-256: a21fdce95235bdd685e2f0bcc81bb2f8ea6a9792f503fbf03e4d24d91139146c

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