Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0e1f361f8e12a4…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 22:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8206744ac557b2bc0573e3122600ff75 SHA-1: eaf097d742df7c0aca3129a0750dc921cec2cfe2 SHA-256: ab0e1f361f8e12a44c1e5fb5d5911022cd8bb1f2afbf8de9604cd23a0eb3e24c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anmoul.com/userfiles/file/zurijoloruta.pdf In PDF document text
    • https://anthonygillant.com/userfiles/file/gerogageme.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/petexofegupukiven.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/e2eb5f6c87fbf16bb3953ab7bcf6007c/80145920691.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/beguleximolama.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/3sghi5tiahpu3746hot4d80pp1/naxenevokokider.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/ruzebu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e96303a54---18590563278.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/potasi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a849c93cbb---wagudekeziwoxafepenef.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/83342261549.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/30933085766.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/xakalubopuduzasula.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de386ed0c4---57325830295.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/pijikepulokosiropibejido.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/kilanelarigaweri.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/dakimulidadika.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/26377443697.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gipoz.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/mifopinerovobumufun.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/2427929841.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/49259313350.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/07be74a249dd80e54edf2ff04712cf20/kevenodakizavebawubiviso.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607507f7bf3d6---rupovaju.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/5396251838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=2012+dodge+charger+repair+manual+pdfPDF 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_off0000e156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 11100 bytes
SHA-256: 116e1cceb0cd3a4991b2664a0399116a0e11bd1d139258564c98903dd23f14e5
font_02_sfnt_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 17720 bytes
SHA-256: f2b0b8e8296619bf65300f440df6b5e361331231c744e74dcd9320be25f48d27

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