Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39e7004e1c83e53…

MALICIOUS

PDF

103.8 KB Created: 2021-06-26 03:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 900ed6295c721fd6d35027fa9ffdfceb SHA-1: f49012590b00831c04e5a0c6038af6d840c7266d SHA-256: b39e7004e1c83e530c20f4e49ab80a7d1a6f55d40c7e94cea5ef4687210a0e13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and link farm patterns, with many pointing to compromised WordPress upload directories and disposable hosting domains. These links are likely used to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://crewmak.ru/uplcv?utm_term=tithe+in+the+bible+malachi PDF link annotation
    • https://ferropula.hr/files/5795138862.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/16154826912.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a65nec956mhljv861bdmee8i10/danefubizorededejewodud.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2a005194---baxelogiwatokabifol.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a27c9139e31---77921499763.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/gebofazowikitor.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/wifafozagatoxe.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428034632161.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/1idemvs7lfjrg70es80o4r1lp6/zefabegatu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076948c36784---nunomesesapedimariv.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087933a89e0d---56317178198.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8b8a4d1e1---lekibuzijiduge.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/32103665156.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160960afde5f0b---vixitefetobomusakovaf.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/7981561558.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0a32ed1f668eb43d3f71c86a495dcd39/5772881356.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/71422444990.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23fe58c8e2---98615582937.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/mirafuwujepo.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160af9215219cb---7734127641.pdfIn PDF document text
    • http://talleresjpg.es/img/file/36164803876.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/cd1cda87c025395173679cccfe9f566e/84319702300.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14e7971e1---98528906296.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd07945f7d---daxegixaposolejupir.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ba7d6afb0078674ffce50aab9a2bcb74/74052493336.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_off000136d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE3 16476 bytes
SHA-256: cecf9c86018ce38dfc7ab6f656a8e00c95578c77ec3801b7f2831e813a13c49f
font_02_sfnt_off000179b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B2 10208 bytes
SHA-256: 8238396d2537da28f583efb34a10b917d9ecea549595888b6bbf29ca9fd8b2cf