Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3e4d25107e61eb…

MALICIOUS

PDF

101.5 KB Created: 2021-07-17 01:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fbed08a57880cca3b18650deb4ecc3d5 SHA-1: 133cb6ace724cc9dd7560b6a0bf6e1eb4784157a SHA-256: ba3e4d25107e61eb998101aa5bf936dfb31e197e8c642d010ff9b62de4c11c33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alshamiltrading.com/alshamilfiles/file/51327440284.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nho4ko30s5s0osutun9aaukdb4/seredonaginunakesojumar.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a07bb89ee61---sagezozomof.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/28875632468.pdfIn PDF document text
    • https://ebooksweb.net/files/file/61955355679.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160961acd26d37---61738715657.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160826f59263cc---24828942804.pdfIn PDF document text
    • http://amandamaitland.com/images/file/bewovumati.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766271aa3da---fopububajusor.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/semejeneked.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/6e24674bb707d02dd09ed3be8006ec10/pibibirabadozilurok.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/94942978270.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/77226932339.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/fuvekubuxodixetige.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b8521e2cb7adbdb46cb1bc696c75e099/kogekaxazebawanibesawolam.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/16801481234.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/91247423316.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/takis.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17cc1e984b---fopilaka.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/241a083d6291ab10134b1a0950baade3/47904390463.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828f6ea3b2a---50979111373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=born+haber+cycle+for+na2oPDF 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_off00012726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12726 10500 bytes
SHA-256: 42f3c3e543cbdebb3a0afc87bc25e55705b5b432a8139561d31b2ae7768e8192
font_01_sfnt_off00013f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15723 18568 bytes
SHA-256: 9c776e3c8f7a0f0d481782619479ab2237b048d31d21af49ef736167b5d9d57e

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