Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7ea4e2cdf325c2…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 00:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8eca00cb951b4e94a7e4a128a0ba7d24 SHA-1: 0da3eefd52143bb8378d607371ae6a2d845da185 SHA-256: 5e7ea4e2cdf325c206ee1a4fb90bb364538e02227a2d3345a4ac8b87b2f035cf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ketchas.ru/uplcv?utm_term=moments+class+9+solutions+pdf+download PDF link annotation
    • http://abogarestudio.com/userfiles/file/posevevowinupeve.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7ed6d4c29---jukewi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cd8bc610e---14945959511.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f4e05d08e---gakuzuxidumilidufevipa.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b23025beaf2---79006600835.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/muvaberizamikag.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/jizupibunosakajaguk.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/22131041881.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/mibeselekura.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be298b22847---78711524544.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de3654e46a---zezanofit.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/pumivakafajokamowano.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1087c54da---89684821531.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/21579099277.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wakekivebuf.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133deee4fdaf---jigajokasukaf.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/d393a2c26ce3e7f20b47e8aa9d5223bf/73447653337.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a17bf1947---75360737002.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/57477701897.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/6k3gg8a7pp11m5lmjld3fbmfqk/59840234222.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/ralefabagavobib.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/gaboviwifezavevili.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/fujaj.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b77f4cfdd---kisajaxude.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/fewabugu.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/vekitepotipadevelujumafi.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_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 11028 bytes
SHA-256: f58726b030a73c07ee460eb457b433f9e37477f9c57f81f94379f7dc9df1c170
font_02_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 17912 bytes
SHA-256: b16e6e1c3ef1f65503166a42fd36f201d965c51b29ea7965b18aac2ac122db01

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