Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2bb719d493bf95…

MALICIOUS

PDF

87.4 KB Created: 2021-09-12 17:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83822232f807a1313cd4659a39fab306 SHA-1: f4b08c60d8ba64be002e390fbb2f8b1dd6b6f75f SHA-256: ea2bb719d493bf952ac0652e3c8f6f2c3dcf8bc4370e081c15a08f2f7f5b0feb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ksboutlet.com/file/files/36996844748.pdf In PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/80961014472.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/21346666513.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/62095507058.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/lepabuvufewi.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135ccc9ec56d---boxumuzilo.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/penivolobageviriwosa.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/55886843281.pdfIn PDF document text
    • https://mmtours.si/uploads/gitefedixer.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/fexafowasebadax.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/57175321752.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/59088474931.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/98774073332.pdfIn PDF document text
    • http://progetec.org/userfiles/files/vofobetopomafuta.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/sawepobirixerad.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613651ad92f14---71729391646.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/vofer.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/67855972727.pdfIn PDF document text
    • http://runhouchem.com/upload/files/2999580652.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/71601601589.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109021358581724.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/87483203557.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/birijatu.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161372984f1ad2---35751572236.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/duzadidon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=dls+2020+apk+download+offlinePDF 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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 10712 bytes
SHA-256: 7112ffe73d0d65d18c2b6467b9fbd59c8563feb51786eea8ac849ace0af77f91
font_01_sfnt_off000106ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 19028 bytes
SHA-256: 678e46fcfc79e35457a758611c005829995422ddb908089018d2df720f98d45c
font_02_sfnt_off000137dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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