Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd30d3b5faaaf52c…

MALICIOUS

PDF

84.3 KB Created: 2021-08-24 22:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a769405ef2bc4413c87d8e4815278114 SHA-1: c97ee760b05c60e55729caa4166827c1ef2d49a2 SHA-256: bd30d3b5faaaf52ca6cbb81788763b895ba12735dadc38975b9304467905c5db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, pointing to various compromised websites and disposable hosting. These links are likely used to redirect users to phishing sites or download further malware. The document's structure and the presence of these links suggest it is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=the+type+of+rna+that+binds+to+a+specific+amino+acid+is PDF link annotation
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f9ef4c12e---melofalukabani.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16ojc16i4v4odon1f655dlk724/gipujirivirava.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/potabopixivunevinepotosex.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b42b4d0bbeb6d4c4d5690ca2e4b52dae/43510466654.pdfIn PDF document text
    • http://sinners-party.de/media/file/negorewadupir.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/sivijojenofetogeg.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/vafunenitaromowa.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160810f6db830e---kasagawe.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/9282652562.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/41798198117.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087fdbf0b082---27760979529.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95557413696.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf1b3cd76---sotukizabenumabadomu.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa//files/fifuzekivevujizejivas.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/58537199590.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4e00187a---vizolori.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/juzopapapodatu.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b2553a78d---52495174909.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/80344125814.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/4678e5eff5cbb72f1ab6ab182b3be1b5/kozuxosavezoti.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/53700142179.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc994f358---pevebeki.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/tenusukefub.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ttga2fhftghg2dnrbda7pdrbu5/xadatime.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b049a6f25---rifulitejipek.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_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 11056 bytes
SHA-256: 3cf280f84bb6cacfe490e6f6ee540322822a62a6756654371efc039d9f3a2859
font_01_sfnt_off0000fd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 16700 bytes
SHA-256: 0a9726cc411e5c199cda8cd05b8aa7c5fb2eab78f7eca4a194ed4905fadb385c

Open this report in the interactive analyzer, or submit your own file for analysis.