Malicious PDF — malware analysis report

Static analysis result for SHA-256 6454a60ef20d4efd…

MALICIOUS

PDF

71.7 KB Created: 2021-09-04 09:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4ec0dd2bab53d6bd91de25bbf2b0c783 SHA-1: f5dd15ae380d8937688d0acdd9e3351befd6debc SHA-256: 6454a60ef20d4efd6a109e589b0e85e3e2fb4389086ab9e39d1c7326524ca68d
176 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or raw IP addresses, indicating a link farm designed to redirect users to malicious destinations. The presence of these links suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/727b33561b474c703939faa205755a3d/poxixaxuw.pdf In PDF document text
    • http://strahovka66.ru/userfiles/file/setirozujebasakavudibaz.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/mebiviz.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/93749577745.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/45077131250.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/cc0f958c7539693efd15431fbc93e19d/fotelupaj.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/laxivetenowok.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/kibebejaxo.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bca741c82---28729735480.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608313f47800c---75728820142.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/bugob.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ac1c7573ba70f01ddb6af974f64d428f/17324581388.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3d4e1db1a---22948155701.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/60525159766.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/nesiwemebizawuponofanewu.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/tovugowuwalasesidavon.pdfIn PDF document text
    • https://raljob.com/userfiles/file/65918259143.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/85976427654.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d8b91a69---bosibanewomenitozetetonaz.pdfPDF link annotation
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cea7c7c53---livubugedimirasi.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8tonnssugu5hfct63ic6n7kokq/63179078829.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/68887002080.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/kisovimoxowogolu.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1c54d09d46ca3294b24e89885b3cf6b0/bikubezutovedogafugutal.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b82bd1e8d330ad9679b759a1031c6485/wutawofogifutit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=nutrition+guide+for+chronic+kidney+disease+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/74265180166.pdfIn PDF document text
    • 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_off0000ba97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AE 11136 bytes
SHA-256: 06b725aaadc6c2cd7cc17e1ae29392f3f33c7363c2019ffaa2f26bf316c5ed67
font_02_sfnt_off0000ec77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 14588 bytes
SHA-256: 3457c6364338a39d812d0a89899b1db80ac1b4076ad55451624af7cceb0f1cb3