Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e8fb208b30d99c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-05 08:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5981c664754003a321a290e8c54df489 SHA-1: 7db1693e5ab3b377c3e9d0e9a890e89c8ebdc4f8 SHA-256: 30e8fb208b30d99c7ff662983b0336ce84c67b9902b24921d52b31bbf4c4a9e5
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and other domains, likely intended to lure users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://sentezetutmerkezi.com/upload/ckfinder/files/jawawoteses.pdf In PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608da8fa49990---molidojisidizukazobirin.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/jepiwiri.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/26548287817.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/fegude.pdfIn PDF document text
    • https://premiersuli.hu/files/files/51683585975.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/kirinen.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/60416cb8f55a177a2263dc28e3b7d905/19568883292.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bed801df0bef8c873d4aa4615ab4ab72/ditadexalazaledetefi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7d3089355---sepuxedu.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/1165375442.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/kfb4qhpbkj8bviolo0lusbkm65/jafudigabori.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/pibozalamavafupu.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/905890c2d6243283fad2c1fe0da63b48/defupudolur.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/godaf.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/wasiwuvu.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/donaposude.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1oaqpgtj3ngur3uvoo5f5fchhl/wopokopuwewalutika.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/41866640651.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/85460a7e43fb54d5e18089c67b8df3bb/lumawajavepukipidusodono.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/varivejugon.pdfIn PDF document text
    • https://susta.vn/userfiles/file/xupividiromiwegomib.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/dipikilurabugofebexadiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=numeros+romanos+ejercicios+resueltos+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 10988 bytes
SHA-256: 10d30ccab86c617d1c0d566f9e26e130916a3653fbca21dd4f3b482a4369a842
font_01_sfnt_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 18052 bytes
SHA-256: 3451aa1dc9325ae92641dd2919a71beca5d35e558fc1dac00f66e3a2e7116ff9

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