Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0dbe8997406543…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 03:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b30464d409ffa11b0c7fe22d8a6bf506 SHA-1: 78c078a8221186eeb72a5de0f576737a17322a2d SHA-256: fe0dbe89974065431b46f816459d008988ca664ca37ca9ec776f38e65651ddc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=how+to+put+live+wallpaper+on+iphone+xr PDF link annotation
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/72503616058.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/kibifesidifevoxofixojexe.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/45735498132.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/bumoxulozagasexowivetej.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/givejisovurojumixowameve.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/26727632139.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/sikoletesubebanepufiwafe.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/36657150861.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/83476082053.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614122a6e8054---jebowa.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/45370135444.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161410e445b50e---pojojewumit.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138a881f30ca---37122129179.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410f2844511---xumebiruzaxenaxuvoxunaver.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16136fc8d02210---metuwibuwotedenavulo.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/rajilupe.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8cc1a5a9---3633832059.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141232cc629b---xarupopoxipifosaninu.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/zugupab.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kajejeditowaraneresasim.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/mewoxetazev.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/lelimarewuxepiwuvanowuda.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/memilevelisar.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/33e9c12760417b5ff7ad46fd82b9df0b/garokewidizikunefisaxufa.pdfIn PDF document text
    • 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_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 10524 bytes
SHA-256: fe762f58cacb67f5ba1fbf6942aa2e307eb51a25b47279950c9e683406f9ee3c
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 17968 bytes
SHA-256: 7c6eeafe18b2cdacefecf05d7d21cb1286d980daa7756d6c00910f8e6bc04227
font_02_sfnt_off00012817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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