Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c746107915021f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-10 02:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 182ce02c921ca2c29532cc229cc4ac40 SHA-1: 2a7ad71383b5edd37e749b7f2a03828e9639cf5f SHA-256: 36c746107915021f4ee7d4f29a9e19a17909a565f5cc0f6f7308761ec099aa81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://hgindustrial.eu/userfiles/files/25539608540.pdf In PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/15730272673.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/nogevofexataze.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/72694100966.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/37942059527.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613075d98d81f---pibidijozuratuwo.pdfIn PDF document text
    • https://taperagi.com/contents/files/mitexegebufixiwiwu.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/77170730627.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/ganagulosegulevilowawan.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/45966836397.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/jowisoxenoti.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/6814531196.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/takit.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/difiwipawozida.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/60548718161.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/20653098309.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a90e5ccdf8---5983885143.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff781a32ba---98888588146.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/30230755732.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/vawej.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/95564429.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9f8095137---75679139951.pdfIn PDF document text
    • http://premiercontainerlines.com/media/ftp/file/bufopijobu.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/rasuvu.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/tixagavotulawilagusodu.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/88003922243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=avatar+tamil+dubbed+full+moviePDF 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_off0000db4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4E 20816 bytes
SHA-256: a9faa46a5ef188aef759651a6c59408cd4faac05acdcb5aa69be6fba7debb72d
font_01_sfnt_off00011238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 10532 bytes
SHA-256: b48b77a17fbd429a9767b3e49335efe31678cc407d4b970eb8e8d2fda42845c3
font_02_sfnt_off00012a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.