Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7f2658b74d4dfa…

MALICIOUS

PDF

91.3 KB Created: 2021-10-04 17:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 2dc881267ea9fc08b95a651795ff1256 SHA-1: ea60651e42329b216567be8b4552d8150868f35e SHA-256: bd7f2658b74d4dfa9c62315ca0f4d92a88741f389ca2a9ed758cc704111187af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://ketchas.ru/uplcv?utm_term=kitchenaid+meat+thermometer+instructions PDF link annotation
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b6d0791cf---2280926399.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/lumeladiv.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/dusomu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/9cmuh2nsehovcpv7ia7rdetp8j/dotuxetutolisuzitepefo.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/cfa79d4fca81a70f818ec53d8017d4f8/97557250385.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/56618634756.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/69495185619.pdfIn PDF document text
    • http://julianina.de/upload/file/11423665950.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/lebabetapeziwo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af8c4a356c---buwedesejagalokoto.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/sumirid.pdfIn PDF document text
    • http://zhuxintrading.com/uploads/ckfinder/files/20211004/16333559901902.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161321da8ad7ac---35925950987.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/jusipopemimobulakifaki.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021091110455470554.pdfIn PDF document text
    • https://greenways.at/userfiles/file/60850287279.pdfIn PDF document text
    • http://grabnerestriche.at/sipotarotojorosunemo.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/barujimasefudi.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-07/210907075142077636khk81a849mm6.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/liwirajozule.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b1f77a0f8559d686a997e74ec3a3bf10/52418089775.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/18392765589.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/bijotoxijijabuxod.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/lidukudorenajemewub.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/fabomeganijifibadu.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/rurovowajaxixowefutukum.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_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 10680 bytes
SHA-256: dff7d218757575ce6b38bb75f8c36f5bf35eec62ee55ca7c5b7dde646dd2aa02
font_01_sfnt_off0001159e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 19608 bytes
SHA-256: cdf685e6c5865b128e892eaeca14a2671716145f44f129cf212949784a0a9454
font_02_sfnt_off0001471e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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