Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d127e04e65eda6…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 10:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 45779e39c8ddc6c6a44f16b82bd0879b SHA-1: c3d0c09016e698ccf071ef6bcc695742bb0cfb55 SHA-256: 17d127e04e65eda60ef37f3e580d9cf590d8f59ef84564895ce3ee5271677213
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://fullhousetourism.com/UploadFiles/file/20210808030147174.pdf In PDF document text
    • https://arzhosting.com/calisma2/files/uploads/62052536340.pdfIn PDF document text
    • https://semut73.com/contents//files/fugirekapurufixezasubovoz.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/22037174687.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f236a0bddafdc77d1bf124139d0c08eb/kasizitedit.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/2150584934.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ccd849a0---54008358157.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/jizizujobiriwesodiwezile.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3ce6e4c19b0337b1274c1ac1327fa7d4/91937057330.pdfIn PDF document text
    • http://mcutech.net/files/neteluvoxan.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/35742565001.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/f5ba59c9daccf524b92b3c76d93af45b/dixobupiwabuw.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/dometuxarumowigoror.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/41042133384.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c94eb77cb36---lekoduvezefuw.pdfIn PDF document text
    • https://digireg.ch/upload/juriwazikopefaguvurakiv.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/wiwidikilexutetikunikig.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a065d8e49d9---17394096449.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ee24f23382a---79546605462.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/vapobo.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/15113323152.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/kofudix.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mimofix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+art+of+covert+hypnosis+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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10948 bytes
SHA-256: 24023f464db2c1c1c4516c9021787679ca5154ce19512a14cd7a02e71dd57e5e
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 18400 bytes
SHA-256: ae19e4106d332631caf427749c92e5883c32aa60374383a05a6e5cd0669febac
font_02_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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