Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedca33eb9155408…

MALICIOUS

PDF

88.3 KB Created: 2021-09-01 07:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7aa02f2e7f3b50b45bb7fa68a9f58d84 SHA-1: 538bbf4371b90bf39074b1b765427f45de0f78f9 SHA-256: cedca33eb9155408547d011f73b8b87cc603792465f964b7bff3195fb8b58eaa
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and URL patterns align with common tactics for distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://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://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_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 18312 bytes
SHA-256: 1916f0f2730cee726e9cf85fcff22b49bc7ace4d36a1b4fd69b3e60854a06123
font_02_sfnt_off000138d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D8 11448 bytes
SHA-256: 8cbb8cc5d47f230dc0b1487e1e0b8e87ac5860099848cf41eb8c748f9a1a3910

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