Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45d518b1bd14a82…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 07:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d6f6bcdb7f359974f159b4751f5dd032 SHA-1: 502d669b87c991253272e244ff6cf95c021931a7 SHA-256: f45d518b1bd14a82ec4b0db906c8320302d33097ba5377f952d81e2c03f89a3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and a deceptive download button, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kozhikodedeaf.org/admin/my_files/file/bawosona.pdf In PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a400f2ea2e9---nifajog.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/83276345906.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210618_262AD6935CA3D0BC.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2e5569e9fcfcd4fefa704a08259b3e4d/91641517421.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210607091311.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b413b50a---kupidopeveral.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc629a03d94---28810010400.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7f1c72e19f9146a49727d6f2b83cfb20/31735808656.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c81c67317a---fixigixibokexekureka.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a544a01580b---55614818554.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d12976297---27007788716.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a404b8bce62---rajatubade.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/dewawupezujozatawepujebu.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/simofowurokiwifox.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838abae4024---sizosemu.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/vefawixej.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/82039095882.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba321384e65---16215716403.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/fovofobagizogowu.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/mabasozefobi.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d4494ed8d---zidezoxuwutiwif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=manual+running+totals+crystal+reportsPDF 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_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 18112 bytes
SHA-256: 88ded3ab29c03c4ea990a09287c9a2c29f7bf44902b0f246fc26bca0dbd14e0f
font_01_sfnt_off00011b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B38 10756 bytes
SHA-256: 1f611fc114dbe2e382f8186977bc0d12a8bae8806e4df838d005223f457cbe4b
font_02_sfnt_off0001341f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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