Malicious PDF — malware analysis report

Static analysis result for SHA-256 247ea64595c1645d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-20 02:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a7d34e4680d8adf93047c57620b03194 SHA-1: 204c7dc92669d82a90aa731808fb77f336376c39 SHA-256: 247ea64595c1645d66d4b23b4041df2979dccfe2e42ebf5c145bb92b68c5fc42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

Heuristics 6

  • 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.
  • 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://ticketsperiodico.com/galeria/files/wazivigaxobiwikaseg.pdf In PDF document text
    • http://studionegrelli.it/userfiles/files/lofunaw.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613febbc0f25a---19486879827.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/87910818673.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/2700792090.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/63658638223.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/tuguwadugibizetoda.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/42794733737.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/71819785388.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/mogokabagezup.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/27465908940.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/tadelemubabawufizarinir.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bowutoget.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462ce3134e5---gojasorapopisuz.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cb7d85ade27ebf41f83da2b80e8c0b00/77320975888.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/rexog.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/jitovudonivaka.pdfIn PDF document text
    • http://risme.vn/files/xupuzutesowomiz.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/6478347207.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613904f94bc1b---52743993938.pdfIn PDF document text
    • http://elpijisystem.com/file/78288245366.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/lixug.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/pozipifawumuselafojasitaj.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/15820503579.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/zaworigikodajinugomi.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/tapegameguz.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/60256848407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+live+wallpaper+wmvPDF 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_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 17248 bytes
SHA-256: 8c70b3e0cbb4fe18fec2f12f9cef7230ee24856f00971af1366ae86613d077b8
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 10440 bytes
SHA-256: b68f5e1f0147e10b49d678024e6d864e1e5fd1db676c3dada0bb69ebe4b7b524
font_02_sfnt_off00011295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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