Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c62677441adb68…

MALICIOUS

PDF

86.5 KB Created: 2021-07-01 20:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a407b492efc9e61f22055a247ae88f8 SHA-1: 349158a6d6ed90dd7d4e1d7f707f0a5e26fac05e SHA-256: 97c62677441adb68155a35796ac8809441c8387d1cbed55e0a9c9a6ed5e50962
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and the use of UTM parameters suggest a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=what+month+will+i+graduate+college
    • http://andrelandberg.com/userfiles/file/bezagonoduviku.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/pi8b7u15a92851kk8qs6vb0nut/jekenedepir.pdf
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mikodijapifiguregid.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5845f0d45---jukasadikezatudekolede.pdf
    • http://elcampoeco.org/FCKeditor/file/fulupejalaxigi.pdf
    • http://esistore.be/userfiles/file/15585406623.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16095760b0d1bb---27152780763.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af83bd4eaa5---79843152502.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab287312f3---dafakowonetomut.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b88elpstcflh25e8eshs9701gu/vebutufibo.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/03df79e5ad1e2052065ed24d47b88efa/75206619955.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6d12e163---nixulemewaguwabazepisi.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832f28223ed---478342496.pdf
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/78758916625.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a31058a0---35866749471.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/af5a4b4fba2a4ef6e7451d9da0112440/fuzotidobifiwab.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/de470f3c161c56a57d15adfe68a6fccb/kinumabasof.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/lm3buudaq3d0gau2r9r4j0ptfs/89980274749.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608efebd635b5---xevabigu.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bba94ad60---27173061677.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc2dbe0a9c---zapikosusog.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6eb1c4cb6fdc6cee0e8f1a059db48588/76768991290.pdf
    • http://goodwill.as/userfiles/file/xukatujunasoza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f069.bin
3b49015f0cc947498aa8f2a16fdbac527127caf80ba75eead99fb4c8d24c7a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 10828 bytes
font_01_sfnt_off00010909.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 16792 bytes
font_02_sfnt_off0001211b.bin
47734f87bbaf06074a28fa221100dea6c04e7a8cb3265e0c0193449aed947191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1211B 16912 bytes

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