Malicious PDF — malware analysis report

Static analysis result for SHA-256 746465bad09fd4fb…

MALICIOUS

PDF

91.1 KB Created: 2021-09-15 11:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90f1f25de53c33560a6521386e2ae04a SHA-1: f77a0a6cb06f38f5b646e20f7ee07e32128fce9b SHA-256: 746465bad09fd4fb4fdfa77d9c74f7ff3196ed4d53e91722a6086aed99510907
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various websites, some of which appear to be compromised CMS uploads. The presence of these links suggests an attempt to direct users to potentially malicious content, such as phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://spherule.org/wp-content/plugins/super-forms/uploads/php/files/33sguj5451u6i6j2b68djpp0m5/99717533330.pdf In PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/vebotigukipofezopuja.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/28552801528.pdfIn PDF document text
    • https://yourwebcenter.com/files/file/gifuwoxew.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e637fe856f---degaxebelabubagogip.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090805474166.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/64920068321.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/30032599185.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/dunibosuzumove.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67c189491---54543218387.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/19556378305.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5a714cba---wilisibexodejowovugijirit.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/90613957061.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/41495634792.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/54921894444.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/mutimasifowubefeviveli.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/tabadukurokanezarufajag.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/rudutuwirawom.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/41920401777.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/686f6d468629d24729fccd32e31100b2/44678271242.pdfIn PDF document text
    • http://gardatrans.com/content/Files/xibofibeputumisosir.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/vamekoxefenag.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/kizimobovusadudew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=22bet+apk+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_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 19120 bytes
SHA-256: 55f69b3b0b4de3635023ecd422ddb27ab56d6c700f9f9334c901846563c18c3c
font_02_sfnt_off000147de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DE 10368 bytes
SHA-256: 13bdff9ceeb89fd538a977d1ddcb3c94afd07d28cb4b8ca23cc97b8a33c51bb9

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