Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80a9dae1a21f2d3…

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 20:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 738848446ca6b87f96211edb147184a5 SHA-1: 98f14754b222683db75b36c5a8903850fa6115c3 SHA-256: d80a9dae1a21f2d3e20b89aa620e7d0129863319bead5632071ddff5625497a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8c28520b0---85570918428.pdf
    • http://jaatkinson.com/userimages/latitunilujegamewajabavi.pdf
    • http://poltinik.ru/userfiles/file/89229129539.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/10241175088.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf229c73ed5---71906016859.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/8spft4eunjbn419hp80ek450gn/rusezi.pdf
    • http://maxtarget.by/ckfinder/userfiles/files/leribelodoxadobaxonoviwat.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707690f1d3d---dagixutozozove.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5dfd6f86cf1545439b63b17eb85a5029/87350702965.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1d261075cb13c65aa8902c3105270a60/gitipenawajivedupakeb.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eceaa76456---20485776308.pdf
    • https://hanyauntuktesting.com/contents//files/36747679580.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609823c758b64---jodegozevozas.pdf
    • http://iphysiology.ru/upload/fibimagexigun.pdf
    • http://phaptangpgvn.net/app/webroot/upload/files/51025630888.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16087f52e1d002---wujes.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f453e72871---21590891291.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/989bbb0c9ee5fbadb3dc129cb78f7de2/gajedafevodeluwipawifo.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/f0uvknq6gah7knlj7kvgthkjfh/35992211800.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dab410401a6---9407400357.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/07uhjps1g4d5vnb1vb4pdqaa8i/rezotagedulexusesewabo.pdf
    • https://contabil-fiscal.ro/mm/file/58335530800.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f837a97c---mugedotufugibo.pdf
    • http://ulrike-mayer.de/userfiles/files/silafejis.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc83bb36e---17769788379.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/10095845677.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=monica+and+dax+shepard
    • 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_off0000f1f4.bin
3dffe297539cc821c9bf6b984c7fa48bb2c5b083be93be38069c1212e5a1c803		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 10560 bytes
font_01_sfnt_off000109fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FC 16792 bytes
font_02_sfnt_off0001220e.bin
a21b4fa6e575115e8a5b118fd21c5a8e2c27358339ba7c7a5420babe7d5e458c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1220E 17972 bytes

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