Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a3461352d3978e…

MALICIOUS

PDF

88.9 KB Created: 2021-07-07 18:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17e09af6732e2222e18e5ec02e3117d7 SHA-1: df416da50644c443095e9e53856737668c12ca77 SHA-256: d5a3461352d3978edbaa7b1a0e4907053df79e2e5c9e8c3dd4d6fb5dba9556de
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of these links and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b47e372802a2fbbad5dd6b728e10c9b5/57713983125.pdf In PDF document text
    • https://arvikabc.com/images/uploadedimages/file/xiguzujigowupabeju.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/suliwavonevivuxadagu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/132b7612543bd4d6c5651afcf43eab98/bekoxenovobujapakamuxuf.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/21852137794.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788f88822ed---96107218074.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/36218587413.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/2f2503fafbf3682f111d97e15f3f6d32/23602878178.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a4d513ebca7a81c2f96d1aafa8bce987/81261895665.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1gf5jbu7au866e8v8e0ud004a7/joguditebufoxi.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/62705f3fec844bce9b0a0345513649d0/gerokikus.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/mijalurokuse.pdfIn PDF document text
    • http://ore-processing.ru/d/files/24977105444.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/wusutumeje.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed323aac2---15934585983.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/jegozazipavuledunaseso.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/75195406547.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/34082542888.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b8f5f4ac127d8421bf48bfb2caf7aea4/3493390749.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073db8267f98---zunabidanovuvitidarep.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/41506747446.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef6d087192---59177984734.pdfIn PDF document text
    • https://alutat.com/data/file/tamixevokerafidukezawu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=nissan+gtr+manual+transmission+conversionPDF 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_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 16844 bytes
SHA-256: 64aead2f5277fed014f8e0acb43b2591f98e7adb5747036169dd92213a436ce5
font_01_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 10716 bytes
SHA-256: a2b572f69f4e2e65d26e49d59f2a514a51f77f06f8bc8d67c0ab48308a962b36

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