Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32b5f8c5e7de88c…

MALICIOUS

PDF

88.8 KB Created: 2021-06-27 19:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d790c3cbd2d8bcc793e789dd07dc3e87 SHA-1: 9ac7dc51631a29b6a8c473b35a31c8be1548abf8 SHA-256: d32b5f8c5e7de88ce8139e87e24ef657a53bdf7b53b402be0ce281a00efacdd6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a large number of external URIs, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves directing users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=extreme+drowsiness+during+the+day PDF link annotation
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/5ik14j9m43ah3moe73jrpa4sv6/lotugaxilemamu.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/sovudilulipufu.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021060418162536.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa7fd1267---70486782668.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/69412635940.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d5ac8e508---mewupasujap.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe62621786---68815630197.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b5b4f3088---26029568984.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec7609065---88732093778.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/webarojakizupiseka.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210613112122806.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/fc9f0536316b18306b7595b34cd957cc/nijiwokolifopolabu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a7885d982---52537359420.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e7240abe79841cf75517e4fef8c4272d/70010138568.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa53d45612f---94095222727.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/votiluromituponesakisoge.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210527051445.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a56714220f1---sanar.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/lt08r6ls8hor66r25arhag5ml2/93618124803.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/e648dc7e713afbb794bd0701344c5955/zigisajizutaxijoje.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/gozamukewaxese.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/45778010163.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094be39c4d44---59135995586.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/13d6ecb592d5f64e9c3880e78bad3ec8/3961315393.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_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 11032 bytes
SHA-256: 479a6a398fee7c7dc5f339e5352be44eeefbaf81fc4081a8188cbf249ca4b19d
font_02_sfnt_off0001294c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294C 17108 bytes
SHA-256: 136ae98f86eeb90eb321ce582c158bfec44ac8d5bd1c905f3657c7cb14288fa9

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