Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac52e33ea6b27a9…

MALICIOUS

PDF

85.2 KB Created: 2021-07-03 17:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09fb9e66b4070ca645f5ab5f9f714cfe SHA-1: 900661243b03fe083180e9f40bda3c07af5bf50a SHA-256: 9ac52e33ea6b27a90f777480418c480576eeabd512b4f5db185193dd1045b2cc
204 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document's content and embedded links suggest an advance-fee scam, aiming to trick users into downloading a payload. The presence of numerous links to compromised WordPress sites and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/5652fdc7aa48fc91765d907f143d2579/zovibonafodididutabefoga.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608559879485c---70477651481.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b788a176d06---5326297557.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72d82200a---21319650690.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/3e21753b9f3fbab70a06907612f3dffb/kediwelox.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097535e29d9f---13291946083.pdf
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vupuwezudulure.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8262bdc881---72573222890.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087b70d25664---velove.pdf
    • http://artecgroupservices.com/imagenes/file/rijelafegoli.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/327118153ad440f3369f0c3040f2d13a/pupigenozenunoveg.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/867bf32b644c6c7273f63b42839a28c5/vuvilovezipedisesuvuzegi.pdf
    • https://bednidhitraders.com/userfiles/file/85555392281.pdf
    • http://csc020.com/userfiles/file/20210629061036_e6rhm5.pdf
    • http://www.sport-konyv.hu/userfiles/file/nizasinubutesezosi.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/73844509279.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9516f18be0---87214446893.pdf
    • https://promobryansk.ru/userfiles/files/68365007553.pdf
    • http://jdhs77.com/clients/58520/File/66571805803.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/22794199088.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/186381fdbf09aef7c2e94bfe49e87d56/vodifozigumebu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pc+fall+guys+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c8.bin
bacd4e4d8f09330ece24f99cbfb0adcce8f4fc5e607b6001b51d4eb579e44c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 10528 bytes
font_01_sfnt_off000101ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101CA 16792 bytes
font_02_sfnt_off000119dc.bin
66f50fe2a7db82aa8e51c256faae2af6b048d5030aa540c7ec8729c14ae5f95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 17608 bytes

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