Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b2207607b8b049…

MALICIOUS

PDF

83.5 KB Created: 2021-09-14 05:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cf6dea12a6845885f2a9f5577a6458ef SHA-1: 1b1270d4f92b2910e33aac073549a199880f3034 SHA-256: 54b2207607b8b049e0d64c663829ef9f427fa6163807e7b3eec23bacf5660478
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3a26e4af0---47657162934.pdf In PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/19688107820.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/bewixupelezosipur.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20219461415497.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/58209281007.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/82347889478.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/kelokapubigikiwasufovaz.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///40839574733.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/vepewomigekonijikapu.pdfIn PDF document text
    • http://watch62.ru/files/files/21417253448.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/filawarusu.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/27557309971.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/dc3fa72160474205ccf6e6dcb86de212/98558913032.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/wilunomejotovefufedot.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/58989399105.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161373f3f133a9---43963858838.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/47033797819.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/womenozuril.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/setonunatijosokelunekup.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/fuputezewonodopip.pdfIn PDF document text
    • https://andrejc.si/files/file/befupezasipoma.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/43902606901.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326dee349ec---jifuxajijalebot.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/72033000996.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/vozitopa.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/jodadevizugusadigama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=car+parking+games+free+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_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 18220 bytes
SHA-256: 67ae04f319fd416f4ab8011ad3a258bd6ce33183ae0f58ef052ff3f2e9eb58e6
font_02_sfnt_off000126de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DE 10952 bytes
SHA-256: 4f0776363d1e1392df723223d1882bf04d5adfe7bc38f0da7d677ba8975f10e2

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