Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be34181fd300b81…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 20:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db20d0ad681cb2fa7d102f66bb73adbd SHA-1: e00d1bb0cc3a1cbae7fb073f6bc168e22a73753d SHA-256: 9be34181fd300b8111a18c24a72598e543aa09a954e43230acf79994af3b2667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to various URLs, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users into downloading malware or visiting phishing sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/57801459876.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161390673545b2---dezedasimafupux.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/92959829831.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141a9fd21788---fogivumovewux.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/31185775200.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/78349694161.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/gopagemanekunatiwas.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/80676619728.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/56886015439.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fd073ebef36da4db7c483eb945d9dc15/73293337657.pdfIn PDF document text
    • https://paperland.bg/uploads/file/34034295657.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/fegeromaludafebobuf.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161423aab153cd---rubizeteti.pdfIn PDF document text
    • http://petrovaskola.sk/userfiles/imagefile/10621429772.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/88586351083.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/0m3fee01pv6kh6q9skhqe9b66j/lerexozutinuboz.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/22250033025.pdfIn PDF document text
    • http://ptk-tent.ru/userfiles/file/42934207251.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/romemab.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/rusumixewevasubupo.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/34795417358.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea13c1a6d2---2463524791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+download+minecraft+apk+java+editionPDF 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_off0000ad8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8A 14568 bytes
SHA-256: a696fd115787b9838c00837275b9d01449eed001d636bf5ac590c330ae77d9f2
font_01_sfnt_off0000d1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 10964 bytes
SHA-256: 9827f0da6ba8f8b29210ab5b1435a4f8bb114cc8c7d4cc5e1746140752de6321

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