Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2ba8ea3be36dda…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 16:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 73f001a1820a2bf351389c51ca02dd0d SHA-1: 765a90a8f1327854d9cdcc5bec302173374094aa SHA-256: ed2ba8ea3be36dda9b4301de080fbaf9083bff1eb65cc25ea30c0ab4c21c8367
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous links to compromised or disposable hosting sites suggests an attempt to host and distribute further malicious content. The heuristic 'SE_DOWNLOAD_BUTTON' further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • 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.
  • 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://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba2806838c---pevejekedepunonalugiv.pdf In PDF document text
    • https://bosgo.mn/uploads/files/winotepunivow.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/sedas.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/90119440559.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/batotofebojojazeze.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/9a9a186cd279dbf2b441d23981af72ff/nakidaxuzesituwuwunev.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/xupupuwixolatu.pdfIn PDF document text
    • http://whdhgs.com/uploads/file/202109020434573.pdfIn PDF document text
    • https://ienter.bg/files/28015059445.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/9068388760.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/99261489672.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/87792604474.pdfIn PDF document text
    • http://hflchw.com/upload/file/xefenasulaxabiw.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/91297982558.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/89725250650.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/fidokososetonomeziw.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/44630269191.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/94045973503.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/nudata.pdfIn PDF document text
    • https://hoavily.com/uploads/files/lusaladazorupezitelinowul.pdfIn PDF document text
    • http://c-six.it/userfiles/files/tupuvitori.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/799647361.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139c0c23092b---99496981780.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/giwijilami.pdfIn PDF document text
    • https://doitoutdoorz.com/file/v6fcKPJQBFhS41XV.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/penexuwutedukid.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/69c88cff6520c347a2ba30532bec9fee/58870154082.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=aot+mobile+by+julhiecio+free+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_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 19548 bytes
SHA-256: c7c631a9b03668a10bccb2307d7d85715b7daffd199d770f4b0831be4d4c9068
font_01_sfnt_off00010f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7B 11124 bytes
SHA-256: 852f123c9442145f965f7a4499a2c890ab170cc1fc8e2c5efee1090372b1aaf0
font_02_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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