Malicious PDF — malware analysis report

Static analysis result for SHA-256 32510e1ddddc65cf…

MALICIOUS

PDF

85.8 KB Created: 2021-09-18 03:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c9e625f624349c7932bd92d48a9ee0c0 SHA-1: 571e1102958be1af67fb89e22848da70e7cd0737 SHA-256: 32510e1ddddc65cf2f363b240a3d2e34e9bb3c3108871e6ed84d68db2ec213e3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to host malicious files or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://ontis.sk/editor_uploads/system/files/52803731874.pdf In PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/wufawuzedejim.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/gejoxivazatun.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210902140850.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/jadisafaruxozuxazox.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/lasaxibisetabanemuj.pdfIn PDF document text
    • https://badrivishal.com/media/dadujemevov.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/44683229609.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/25185294224.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/birerisuteluxefurexep.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/ragiwegaxebaxije.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161312d05c53d2---69775339592.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/wenagufizexazurimar.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/84097591880.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/kameliseruxopot.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/aa53c7ba1b1af3bce47248e1fb5e4e12/69733753746.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109040229079461.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/varadobodivukisarobelabod.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/nebiviwuw.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136075aa753f---9362081306.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/jerotosuvepiposibutofome.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/50944012449.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b5f3d34fc39b18d8edaee7cc02578345/28987793248.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/94780265956.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/ponabevaxigesitejuligagav.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/rutexovorutejutuxiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=spotwalla+android+appPDF 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_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 17180 bytes
SHA-256: 30785a2c2c0829c74e5ba5f5b24a1c22b3b311caf7e605ba552f3b17881ad22d
font_02_sfnt_off000132a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A2 10244 bytes
SHA-256: 6bcb03d26952f54c5b2587b25580fbeea9ac7745be5c1fa45304aca6644878ad

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