Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9fce233a2d9892…

MALICIOUS

PDF

95.0 KB Created: 2021-06-25 20:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08f3386fd3791b289d9e7453d07aa374 SHA-1: 0d452f88d0399aa6d38182e6767caa2dddf1334c SHA-256: da9fce233a2d9892f856739c6256943abdf8e773f57eb8e1ffb1dd0cf1347bef
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, indicating an attempt to distribute malicious content or conduct phishing. The document body is unreadable, but the presence of numerous external links strongly suggests a malicious intent to redirect users to harmful sites.

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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/47c54f35243e46ed24ce860b27af839e/260129391.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6919c5f89d---vizolopudavodebiwogapu.pdf
    • http://alphasigmaoverseas.com/userfiles/file/limepijike.pdf
    • http://mientaytourist.com/uploads/files/68582226310.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d2892e8942b3ae647c430191838aaa72/suragupupobexe.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/86716f60835d1512ab03b374bac9c04e/39549831360.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c9c1c42c---54811251273.pdf
    • http://antifftech.com/uploadfile/file///2021052501511357.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/46c2a878314f2beb95f98b525a4afccb/38441517145.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb38be1ad---dosekanezosagafomopobi.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/rnaurd5rbtpgnbski4bojqnkp3/57384904013.pdf
    • http://prime-standard.com/piceditor/file/93813664685.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/h9rlij5rs1iiv3lssfnn3lqdcc/binezoragubitif.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609b97c7a8ea4---gojapafave.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2c12f0235bfb9269a5f40fd019c1d8a5/55669982578.pdf
    • http://apsons.eu/files/file/julosexizunejuzo.pdf
    • http://nhuaduongnhapkhauaz.org/upload/files/20683512633.pdf
    • http://jyotiacademicpress.org/uploads/file/42067522097.pdf
    • http://aggengr.com/uploads/CMS/file/75665883615.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/03cb3bce23576f6d0b5473618a9f4845/96581124187.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609890b4e05a7---labedufu.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070262897e3d---deroki.pdf
    • http://asesorgubernamental.com/images/file/rakaxisigatilel.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073bca7bf876---34468358936.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d456029655---6783442124.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+say+i+love+you+in+australian+sign+language
    • 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_off00010abf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 16792 bytes
font_01_sfnt_off000122d6.bin
ff16ea497f43acd82ae9ecf382fe235d92e3693fdd34a9fee952094af634a05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 10640 bytes
font_02_sfnt_off00013b5a.bin
c5e6eea0d9ed96ded425c5527981eca0e45bc804947be462380e5b699394bf0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5A 18632 bytes

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