Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccc37b8d27c6f18…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 14:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 36be281e3b72ea0d338a1afe2fa1bb1a SHA-1: 7bebf87f99587f8b1b2a60b08b08a2c72e38d1ae SHA-256: bccc37b8d27c6f18fdbb894498d04ab77b08cd834f8cfb71945dcb552c5e7f69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://aljazeerahpetroleum.ae/userfiles/files/tozopuravulominosuke.pdf In PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607313080238c---86385432991.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/68203535630.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/73103312545.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902a21dda38---sudifafufikijuvizipaji.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kijularozevejiperuroximiw.pdfIn PDF document text
    • https://yellowstonewildlife.com/wajegabe.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210805114708.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/59550097591.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9acbd760---92003924915.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/bed5536c357b46d2e773656a1335c66d/60633387426.pdfIn PDF document text
    • http://briztravel.com/upload/files/13532539500.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/wenutugewuwomigas.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210811115940.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/ferabuzibetisew.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/48587306354.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/83909123297.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/36640177204.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f07b1db6874---14855097434.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tolilapiboditojegebedi.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847b154a47f---fanuzogukakolebiwafa.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4kuidoor1u9sl22j5mhk6vs067/xolodujalagaloked.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=urdu+literature+books+pdf+downloadPDF 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_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF927 20656 bytes
SHA-256: 2be3082876bac97ecbc8875b20be68c22b4022c1492e0841ca701490bbc9ddea
font_02_sfnt_off00012ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 10916 bytes
SHA-256: a51ce12ff5cb379bd9fca26220b2dce463e844edccb964c983c0336e7f289e03

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