Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb26451764e13647…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 22:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a532f33e56abe7b6f646e15e5e47447 SHA-1: e80646ae2f298ab13becdc50d07aa842664f8091 SHA-256: bb26451764e13647a1ad3c0b7eee11c0c8f6942d55f563d560cf8879258833a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The heuristics indicate a high likelihood of malicious intent, with ClamAV specifically identifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://medvor.ru/uplcv?utm_term=incropera+heat+transfer+7th+edition+solutions+manual PDF link annotation
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/sajipujodi.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/tazapo.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/zomemupekowaxokato.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/15619167207.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161337a43c202f---xurubox.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/60377448603.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/redugukigapuwerujapez.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-5/20210905051759268818.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/kaxiwupukojelidana.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/81719577680.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/xosoxomuzelibapuv.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/jagogefowuxasoxafixow.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/rexulidoxeziruvamijowufo.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/87501015695.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/xekadejetune.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/bosagibigotojevi.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/60027862976.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/wugepomikivebebu.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/93152983329.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161306c82100db---jegiraxotekel.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161311f605d721---rikilevikadoguzo.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/85288184581.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/wutitasaxifopabulitoruwef.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/zebegijawiniz.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_off0000ceed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEED 20036 bytes
SHA-256: b9c38de642e7c993854d819743eebfe886fcf7f290cd34d8edf11505dbfd7529
font_01_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 10988 bytes
SHA-256: f9cabc3551e1b9f3c10aed2af39864f9c4549df82864575408a00109b7b1cb19

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