Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12dc06f8a99c325…

MALICIOUS

PDF

93.6 KB Created: 2021-09-01 22:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b240d75ba837fc377fcd29f37da0215b SHA-1: bfc1caf29e0ca242cf480b874a5b58be4c190b3c SHA-256: e12dc06f8a99c325bf95245f90708ca0913dc75a3de79d2ff71461f13e2c2b30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/s8ccp92d1pffojes19ue4bqdri/wogujugexe.pdf In PDF document text
    • https://buddhaart.in/userfiles/file/werigurilirojilewibevode.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/17842319684.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/5bf9d93003b5bf7b620939a847fdcfed/bibuwijerakazudizani.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/savese.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/3008824139.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/77604244008.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/doxakudiligixagisi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc56d49ac1---37023755190.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/21896707043.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/nenofojoxew.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77733846584.pdfIn PDF document text
    • https://datajournonepal.org/files/roxexajujejinot.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a524523fedcac25be18ef699d553ef0b/33701077592.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/misozifozafo.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/71861758247.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/71747420994.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa06f7dcc7---lifilogebenikanixosepid.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/a0a8315afedf49cb4c96737338312d8d/jalananakivurer.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/wojejofetanubejigo.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/13647961634.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/1n10g86uvtvh7gafon0j69c0g4/tidapifulelejogixuwimep.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/fuwasapagodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+world+ends+with+you+ds+romPDF 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_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BF 17948 bytes
SHA-256: ccc40dd58b7e40c77d0c39cca9ed8c4bd18b1b9f64f6c9a3fdde4ab20c2a91e5
font_02_sfnt_off00014fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAE 10612 bytes
SHA-256: 3236105d0d4340c80574432d77c0e199693ac1740c37140cb46309407829e9fa

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