Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a25993976a1df7…

MALICIOUS

PDF

86.1 KB Created: 2021-07-29 20:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 75559908ed4860e9684c9cd49ee4e38a SHA-1: ad890605214757ae90fbe8a419f5e1efc1cd77fd SHA-256: 45a25993976a1df78806053173a56763bcf8558dd5018027e2f4e4c6746f454c
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farm heuristics confirms the document's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/51632504872.pdf In PDF document text
    • https://bawwabatrizq.com/userfiles/file/mukodowixekato.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8a1c21311---19437638356.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/15599623683.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2225df4c0c914fb354b0a423a8117ac2/guforixi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba88353080---43006306156.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/nulegiwa.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/wejobomogezo.pdfIn PDF document text
    • https://chp-travel.ir/data/file/74891273687.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/37912573610.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093d268b647a---22442904497.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075b590aa17d---mavarimejinofusuri.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/gunizidefewavukife.pdfIn PDF document text
    • http://4bx.pl/public/file/28188929338.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/84202503629.pdfIn PDF document text
    • http://getvisa.ru/images/File/sujironegaxeroxuga.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/1740963545.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/92274982174.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/gesudarirejajegezexi.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/nupedo.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/dovofukepobojedozofa.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/b444cf525459f5669374e4024497aaeb/rexizozozogesebatip.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/eeae38062b51bdf014927dbfd205f99f/267284867.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/puxajusitufifesonil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+forensic+evidencePDF 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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10588 bytes
SHA-256: 2338492e8d85e315f69546c127cc369240687d04a9261ea8987f73b31401d51f
font_01_sfnt_off0001071a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071A 16776 bytes
SHA-256: b74c1bc0888677d37219f5d9b295bd516c2c15cf196e941eb13a224cbbfe939e
font_02_sfnt_off00013229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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