Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae20db905b39d77…

MALICIOUS

PDF

76.2 KB Created: 2021-07-04 02:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17903870b3d4a1195daa7c8a62522dd2 SHA-1: 0bdcf51c18ecd5b96e2f2977c0e1715ca9cde86d SHA-256: 1ae20db905b39d779bf5c1e29c1077864e2618a86cd52bac47b6153d1ead80a6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://menlopark.com/wysiwygfiles/file/lepulese.pdf In PDF document text
    • https://fa-vietnam.com/webroot/img/files/tororofi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e32aa513f---42290495007.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/lonirejotedigoziruka.pdfIn PDF document text
    • http://caramelitos.sk/files/xifobudulokafujononag.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/69865026328.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/43839689167.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/mugowe.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5515b06c9---3232774263.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/gopem.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/mukumutevidozumejem.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adb717b8c44---lagirevedop.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16080523c031af---popekekofave.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/fabazukaxutenulor.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c2b3affa4---77430078039.pdfIn PDF document text
    • http://wawa757.com/uploads/files/muwakakekutaxute.pdfIn PDF document text
    • http://ofipapel.org//ckfinder/userfiles/files/60348392987.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/8072316027.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/43590490038.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18f1b9461---61689737669.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c77aa155058---50755804022.pdfIn PDF document text
    • https://clove7.com/userfiles/file/difidepivowigepaname.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/e131e0db7ef4d9989746dc123c66d6cc/59001251802.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/3626283792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chapter+19+acids+bases+and+salts+worksheet+answersPDF link annotation
    • 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_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 16040 bytes
SHA-256: 7df9084024003fa0e8de1f8699ee536d9d78a56877c90e48230f85f6af7fdd14
font_01_sfnt_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 11180 bytes
SHA-256: 3c159ffde33ec4f4fbe3d41087f66e573fd56d3d70fd9ec2f76e644c65cb119c
font_02_sfnt_off00010b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1