Malicious PDF — malware analysis report

Static analysis result for SHA-256 2202ae20e73709af…

MALICIOUS

PDF

86.5 KB Created: 2021-08-16 01:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8e49a5b0f86bb4be4cc7fd649f1fc87 SHA-1: a242af6e055a34695d6dcf2f48d8c20f07b72a61 SHA-256: 2202ae20e73709af2c56267403e7e956157b68e912aedea14b6eff2d0242df8a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, a common tactic for phishing and malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://archism.ru/uplcv?utm_term=how+to+turn+on+brookstone+headphones PDF link annotation
    • https://chiataiec.com/userfiles/Proj_Name//files/59685886903.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/66503434401.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/64550573237.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/wabolegozogepanapotovifu.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/3525539457.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7be23ccabf---rizedavaneridarugozuvob.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/24333900383.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f252cca226---wotajusuvebokakuno.pdfIn PDF document text
    • https://pcetravel.com/files/file/57976256712.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/27490527437.pdfIn PDF document text
    • https://jetaime-shop.com/files/80361634936.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/37443611392.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/ginoxaraxiwenatajezod.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fi6f8ju042oc11bsvkuere3id/95517117628.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/seas88bjul944fp8l237lhe61p/18508407742.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/p9nb3t61lbt27c35dd4j20p076/libunibizugadapatakut.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/5775158141.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/7920020550.pdfIn PDF document text
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/24039652003.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/66109307763.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/80278588461.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18022d1c55---zakujikavanezi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b562b3b62ae---segamovixa.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6689e1f850---zegaxujutaberefawepol.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051614434073499.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/bedugisez.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_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 10760 bytes
SHA-256: e9c5424fa7a5eea8328e5e4f77431a78e530028be57832509a81edbf76e9c6b8
font_01_sfnt_off00010491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 17928 bytes
SHA-256: 415062cbb1273b0cc7c41b1b81e194f6d64057a80f03218b2a8b2444d6eedfc3

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