Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea11381b1c642825…

MALICIOUS

PDF

77.0 KB Created: 2021-09-06 23:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f0066f292cd55030e4604597d6f3403d SHA-1: f95437cbe413230cd5698ee7de5dcf4459828453 SHA-256: ea11381b1c642825ad097b8ec02618e4a2e80ca49be4b2bbf858f6e5b085cb95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple PDF files hosted on various websites, some of which appear to be compromised CMS uploads. The presence of external URIs and link farms suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ulclhei2arf7gg5hh9nq2nf5bs/lovovakodoz.pdf In PDF document text
    • http://a-kamen.com/userfiles/file/rifuzagi.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/21510974380.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160784955a4365---49249714122.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210705012118.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/wexovilelavanijaf.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/0954bc9adb5cda9af29b3c23e0fe4dcc/21497318455.pdfIn PDF document text
    • http://abnicum.com/files/file/55407483446.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/63723230774.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ce3fb8a7fbbf32fb6b47f7338a29e978/tafakogatejanorefonadopuw.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612612382b737---85287089251.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210817111242463.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/77531695994.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/5vsfq48skcaivph0eoc09fjsfd/tumakigevi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b0243592e3b---duvoxelamiz.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609094a844e54---dajiwogujanot.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bc09e188eb51acdc73d3d4fe954fbe63/xilawewewirewasejegamujam.pdfIn PDF document text
    • http://kotolantopeni.cz/file/livotavun.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/4613366124.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/tirefanamivaxovekivokinop.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/r0smposee0csrpbcvo92nm5k92/30548903735.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/21874009171.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/81203624344.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/gibaxutuxapepulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=thelemic+qabalah+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_off0000bcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 10544 bytes
SHA-256: 9d9daf867188b1f9ba0b4c1f3a0e261b1687c88466400143e6f8bbd27c300be2
font_02_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 21600 bytes
SHA-256: ce4be601d79100df0f0b20186cf31b40a7725ebcf7c0142ac060e1dbaf6aa081

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