Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e517e9a7e5a530f…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 00:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 698a6260b8e8092c44757e74ad26cad2 SHA-1: a70d0cd2059c2f00e066ef1c97661089f327dd20 SHA-256: 9e517e9a7e5a530f2d1c4ba29339b5645711ffda4493b8fd268839aa3ac02f95
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=7+day+rescue+diet+pdf PDF link annotation
    • http://gloria-eurex.com/vavenoxaxoxobarivi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/81477161447.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a28640e13---mezipozulajumemovu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a118159016c---rirelajozoza.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a84647e70c1---savafenovop.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/wujujuvadab.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6a7085bd1.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/xifadazabuju.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b936694fa0f---60828968751.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/33498829657.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/fupejijixodivawabebut.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/c2270fh77haa9mvm3lgipfmbg6/gaxulugomizunuto.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/dkajb75p50lh35srv0g9ppc4b0/rapituda.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161255ad4a4545---78056476334.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/melezexuxoginur.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/71682032729.pdfIn PDF document text
    • http://jfe.hk/userfiles/94058876390.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/wikivesowinebulupofatisef.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/ef8ee1100556768376647f1fc9eb9896/9741805964.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/b0012b1f22040290847b5054c5bc5b59/1157659572.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/58787268055.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/25858077723.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609d56f1a6572---7877631456.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/49355162130.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/83448361638.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_off0000ef28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001073a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 18532 bytes
SHA-256: 0c5d26e13a617e5637b23c46520fca79ba659be7472d991ed672f253c559c9f8
font_02_sfnt_off0001379d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379D 10508 bytes
SHA-256: 8c5bcd0bffb8493883be4c6b5f620a46e58cda2edf676c780526f17e30805bd1