Malicious PDF — malware analysis report

Static analysis result for SHA-256 2979bbe52a7ac478…

MALICIOUS

PDF

81.2 KB Created: 2021-09-14 04:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2915f1989ca78dcb2aba83fd9830ed7e SHA-1: 5fb256890f9dc4f507d933dc414ec6c8b521c787 SHA-256: 2979bbe52a7ac47801167386a7baf897c82ab8c04b4550bcf64befb8cff8a87c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users into downloading further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://bharatbiodiesel.com/userfiles/file/sovaviromaxemux.pdf In PDF document text
    • http://slovoveri.org/userfiles/mobapaleveweparawewodas.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/lomusalupotilo.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/39888669686.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/xorapixemer.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/vudazavazini.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a491441c35---bebizufexilomuvi.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d48c1778fd---gipix.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/jiwukilamanulojuwe.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/muxotivaji.pdfIn PDF document text
    • https://ibextrail.com/editor-images/80928667940.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6c2991981bf1761306e4565f408103d0/mupuba.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/29732289185.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613097b0981e2---buvivavufa.pdfIn PDF document text
    • http://nemalipics.com/kojat.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/22104422433.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/xuvibunalulivilurozawup.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/60242743123.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/69898145597.pdfIn PDF document text
    • http://dd-eng.com/files/files/32641006590.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/83456289953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=yu+gi+oh+forbidden+memories+pc+download+freePDF 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_off0000d0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FF 19756 bytes
SHA-256: fcce2b2ecd766158389fb9357b9d59d0e79b7a9af84a105790a1823ddd1361be
font_01_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 11276 bytes
SHA-256: df616709b14ee8690d4304e96803c9f59d2a57e2863b63e21107bfcd36f74472
font_02_sfnt_off00011eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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