Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d2159eb70e14af…

MALICIOUS

PDF

76.5 KB Created: 2021-09-01 10:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5013b5d8cba8d2e4a2a260a8ccf4eda4 SHA-1: f7a74d63994de0a95dab6cdaa48e5eaa37faec53 SHA-256: 80d2159eb70e14afbf356e0341b795db90ddbb3e9dce0f597bce1b5772e5f49b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure strongly indicate a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://rudolphalexander.com/uploads/files/55439580467.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084c3b948b0e---19479588886.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f9fd369dadea2ef1cd8578e6407579d9/tajogozezefo.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f3c9d1c1---roworozasigomiruzubowago.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160802e7033f6c---26868112153.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/lklg0om860uptn86744mqefvld/vagawinidesiboxumaba.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/jebile.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/95989097603.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/2643951565.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b8dd1c522a---kagulizateredigunokatuxe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eoenihi8k1pu2aoigaccj122m4/dakirejexivojazixenelekif.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c58096b0---zupinimijuraxaru.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6359e89dd3---99240439875.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/767125a3a49d563b5a7cba3881108f8b/xufanixatoxapumuxuga.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bf191b07b---34213491242.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb60548c089---61531569371.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/29356445216.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bde9b3d50---mefij.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/nijoke.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/sodobokeja.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/77454399404.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/firanetejab.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/bafavidazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+illustrated+world+encyclopedia+of+guns+pdf+free+downloadPDF 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_off0000c7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E3 16164 bytes
SHA-256: fef7658c94983f116c66358ed686fbfe9e98324d090dcd3bd7888cf08b2e3b57
font_01_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 11160 bytes
SHA-256: f07aadfba586a83bc13e565f0cd5bcf6a5400bbaa8c08b246edaf589b9f267f2

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