Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a6a2d6c62782ab…

MALICIOUS

PDF

84.4 KB Created: 2021-08-11 07:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d70a89114c54cd1f77a073ce4ce76f52 SHA-1: 38ca168cbb60eb23ffc8810584b076e1e194c3f0 SHA-256: 05a6a2d6c62782abcb9dda75847fe49cdc93ebfa8c52932a457e9f7462b9e39c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7722

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=indian+navy+sailor+exam+result+date+2020 PDF link annotation
    • http://protectakoteasia.com/ckfinder/userfiles/files/80300572003.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/p4jhlmcfcte1grtu4oi2ajhk0n/20939280857.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ootfsqn3nttr39r426abmbipe7/vikofubavonawesepugu.pdfIn PDF document text
    • http://pololanna.com/user_img/files/topaxipefosexufudukujawu.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/22539958142.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4bd41a456---95064147785.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/63525148099.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/293ce01e3d08fee5e8b8308de56ec8dc/98417211281.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/1659777517ea9ec72d726ac2c81ba7e6/davaxatefifotazomoko.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072f85c57e72---sejodo.pdfIn PDF document text
    • https://euro-commerce.bg/files/nalonubomilukikaxixakupo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37e2cadff4---35387643953.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/32dcaa25d6672163027a288de4974440/watosovufojipavokulajuwir.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/gukefazebudolobax.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa84363d12f---48975888169.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/27542836731.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/09ebd622d8942aeeda51d3f7646e5902/55664001969.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/bosat.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f122569e68---tebobu.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/dupexefometekexi.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/85cra9rh6ev3b6a70jpkutqfth/4773706575.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/aa25c90b5add4822b69734aa7837938c/zizojozadoreboses.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/linerofebitaro.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/berutemuvanimajexanor.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/90090327843.pdfIn 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_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 10984 bytes
SHA-256: 33548ec35c748125c69f486d9bf4a52a4c67ef1948217a9fb979c9568e114826
font_01_sfnt_off00010610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E22 17384 bytes
SHA-256: b2da1dbf03a3a682a83413f6dac1356abdfc3a3d09174248c16be450e8296769

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