Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a107093f9791ef…

MALICIOUS

PDF

94.0 KB Created: 2021-07-13 20:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0094ab68a4e5cf77aa234a000c19de6 SHA-1: 922e13fd1cee9b5c18474fcff9346c27952b11d4 SHA-256: 89a107093f9791ef893878f506d6dc8f6ecb79d5ce0a20a7cb4b8e1a27343475
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7obbtg673enpt5f5ovce2pjm54/gusixoda.pdf In PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa9d25a8c---jerigipoxulafixopu.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/tapogiwozimero.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/57fb0819d060295d9326d3e7147f34c3/piwawemebolexebeguxu.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/rerutof.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/karigipubuzulerefa.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d49c95dc---rexaworid.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/pojojipatula.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/bf7e819e9b4887edfbd6809facd64ce4/33941213159.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160babf5326067---61275017312.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/74652910399.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/kedeziru.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a93b62fc8ab6a65629113a1f45eb84e9/87196471259.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/95038441726.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4b96edc43273d7e17346566b60998c3e/komibopadup.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd59df75e71---gukirasonokuj.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48812adda2---pisadosileworodidekowokit.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ccddcea3b4c---22685526301.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/tarebasololegetujoputezij.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/9ef29726323c19e507592892325e920b/luxitaxog.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0eb0489c97c8049ba1955b25fd603ff5/66925650476.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a0b8cb049---30615111793.pdfIn PDF document text
    • http://stroi-sistema.ru/img/58264411728.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160afe184065f4---92758268684.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b630895ebc5---motimiroxifon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+unlock+the+mines+in+stardew+valleyPDF 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_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 17332 bytes
SHA-256: 1fc8e0ccb4196ed62268065b3ff41e3783ba39be4dee5b4c39c56ff891ddb7f9
font_01_sfnt_off00013710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F27 11084 bytes
SHA-256: 08beda83aea1850b2154f1fb6fef1fda73ce8ba993555dd5bd0dc6fc752afa47

Open this report in the interactive analyzer, or submit your own file for analysis.