Malicious PDF — malware analysis report

Static analysis result for SHA-256 118ce741b6a0c005…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 01:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a7c7af4d330ce23d1fada5c36c3a3fd SHA-1: 1ab6c9f92da0eac999da0372ea0555802e168983 SHA-256: 118ce741b6a0c0057994caf458d57bee7f76bb2946e96ac60794d258dc70af17
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest it is designed to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7ksc8jqpl9cv9sah8krok87g35/86136750434.pdf In PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/14445795423.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/75889870755.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/qnsoaseugu7j4gkdbeo6vl65o2/lumowonikonop.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6e5305ab6---95234015694.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/dudir.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/31589780288.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/tabufixujifikofilivuf.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/videfu.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/42717289149.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/565b9ecf619ced9e7277d12150ca87de/sivedulagavagupedipo.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe50162131c---69046048787.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/84919175978.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba293b9f2c---69567360418.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/94589145327.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/kexowijufu.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/83560458089.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/8327284792.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/1ac41da0c2bdd69a4d0e49f53ea84a77/83583105109.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/kimokejapatipo.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/15683216639.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/babogen.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/149fe3876d423c1c58b83ff55be1402f/zefolab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=china+number+one+restaurantPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b3d2988dd96d0c0f34f627e4f29f19e2/20793077952.pdfIn PDF document text
    • 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_off0000cbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC3 16864 bytes
SHA-256: 99cf8e3bc49736d8d321d68c29af4fed14d689faca268753b98d5509efc0c0c9
font_01_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10596 bytes
SHA-256: f2a4e789c0e1b712b609dc0d087e44c5904f10d997f8d788e1babf941223b788
font_02_sfnt_off00010fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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