Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13de9fdc8dfa369…

MALICIOUS

PDF

68.5 KB Created: 2021-09-01 07:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3429559071e6fe1acee5a80939391da6 SHA-1: 95ede7963b4bced152bd12216903db54776fcaae SHA-256: a13de9fdc8dfa369df3f4424760cae56a5a6c98d7a2de52f028143a22448a329
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with multiple URLs pointing to disposable hosting, disguised as a scholarship opportunity. This is a common lure for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to download a second-stage payload. No scripts were extracted, but the PDF structure and embedded URLs are sufficient evidence of a phishing and malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9158

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=fulbright+scholarship+2022+for+pakistani+students PDF link annotation
    • http://malopolskiszlakwinny.pl/upload/File/xigupim.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/22596943051.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/maxamowakajanusoralo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7ec65278a---salikekukakoxomesufem.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/botetutagemekekasijopego.pdfIn PDF document text
    • http://cocoal.com/uploads/file/15791780764.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee21e89fac7---1534881455.pdfIn PDF document text
    • http://learningkey.org/userfiles/genomujuputupusigima.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dffc5a7b9a9---33879743225.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085731ed0774---dotonoxinalusa.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/84989296386.pdfIn PDF document text
    • http://sushi-belovo.ru/files/sobosobakokagunosib.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/vurejanedejozinolofinozi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaea06ae15---niwejerumi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/zapofi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41370d36cc---kebozejedap.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bf33ad87---tipilixutegositewakajer.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/fepixul.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/62971894126.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0b8a088f80e618e44faf49591d55b003/berejufefunuxovawit.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c04b48a9---94539703238.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095e1fdc4735---tunujup.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1fc0c020faee87c0c635fe1326070242/pavejapavisigojozes.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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