Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a14858d1643b86…

MALICIOUS

PDF

82.7 KB Created: 2021-09-08 07:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d7f9dff5e4a4d53c61eca051b17cdcdf SHA-1: ee54f010648644d0eceb8714353fdb614e1b7614 SHA-256: 64a14858d1643b8644508c7fb3e0503987322d643b7168cb4227aeca732f1708
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pr-jam.com/ckfinder/userfiles/files/89791493368.pdf In PDF document text
    • http://achilleferolla.it/userfiles/files/50665771856.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/86064929306.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/pupekopekudowelikawowe.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/vuneguwasegovine.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/vemixozupigomom.pdfIn PDF document text
    • http://newo.ru/files/files/sexofodunopebelagi.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/bobobuguvepomuge.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/9pito9cq9r6jsbb0d7ptkmbvtd/37501077795.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/fcig9k25g8tent720dsb19bc5l/36739608176.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/gepuwubudagazaji.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/12709497769.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1a5ls3v86sqkdsnfh8edabde82/sabevodemipok.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/30964586337.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/95dbca1913c0631f47d499171ca4c0dd/82843751202.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/8530163447.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/81059075407.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/da8c8d8c5e561a5e2f033e864a999b34/weligesubozodupenel.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/7422089021.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/87983931670.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1eb507158f---dafofibumuzej.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/29833771227.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/fe119f7f24572f858e823721cf1279a1/nodikotukujomiwuvar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chintaharan+jantri+2019+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 10752 bytes
SHA-256: aad63efab442427eed52210369d9e3b17eadb039a980ec06e03df5d109c2b3e9
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 19752 bytes
SHA-256: 8171fc3b89ba311011b1f7f10af1af253cc3b68b26c3f37ec51584b8e17f6757
font_02_sfnt_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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