Malicious PDF — malware analysis report

Static analysis result for SHA-256 293cd7a74190e1b1…

MALICIOUS

PDF

103.8 KB Created: 2021-08-06 22:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 17c839da68a0c12f20350347366f7b39 SHA-1: ed758086aeef987aa664cf7e64671f39b7beee49 SHA-256: 293cd7a74190e1b1da554588a0ca0e2176f5227ff17638f35464d133aaa4fad1
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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=o+que+pode+comer+de+doce+na+dieta+cetogenica PDF link annotation
    • http://emannsltd.com/userfiles/63854749291.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ec19da1a2c5ea35c47f515191ee6c98c/44164416425.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/78267579430.pdfIn PDF document text
    • http://sparkpro.lv/content/file/25115001264.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/21543607916.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/boruvijupog.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cec002e34---kotep.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/8820332386.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/68568047012.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4bec8b124132a68e8687d8bf754d65d4/20060097503.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec537d21c4---xexibiraza.pdfIn PDF document text
    • https://everestart.com/images/stories/file/lotedejupupe.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e671ff8cad1---43479420814.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0673123b58---loselesevo.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/92aac66dccd9634aa4e1fd7722725d53/povubuseriwakozagowa.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/jinepominusizusukalugos.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/fitezuvajapasev.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/45201684876.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/guxata.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/9801a7fb9f3cb1bc56bb0f1615b26d85/kexajamaxewiwiw.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/vibetos.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/9c108e26724f6d2a265e3f79f90c93ab/xogidiz.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/d8867106754b5a1b8364058bf0ec1226/99446215488.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/g4orpmdlueao6ukdef0vteb7gh/80504830915.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/manemuluwavigofiwiro.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/zepiloviwej.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_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000147d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D2 10912 bytes
SHA-256: 3121597d37e2caa2443bb89f8ab6a4e889ce140036345ce4708f5aaed7a458f6
font_02_sfnt_off0001607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607E 19224 bytes
SHA-256: 3fbf929ea77a6501882a0740d5ab2d88f8a018f7d7ccf77e1885c7642ee8ecb8