Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0679f795603f6f…

MALICIOUS

PDF

73.7 KB Created: 2021-08-08 13:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c2b1f2b56b6a995b70ebcde6455aff36 SHA-1: d1c66b81bf82e52d9f597fc9c98228891690aca1 SHA-256: dd0679f795603f6f7bdae2c27ffd6e9f437bca5f570a19d325633c786da4bd54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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 http://prmakeup.com/Image/files/40295412202.pdf In PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/kukutanex.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/derazixipazewa.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7881b9b502---34266256736.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/45249711395.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076deeabc3ed---77260720608.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/gofakazexuguw.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762689b336c---99584964773.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9e1528e84585bd9f750d24bcfb480b86/netidejutizawelafo.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/39442333422.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/64728033950.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/98539537821.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/73646819327.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/i17mess907hjsbu8g67b8gclj1/soseramobijusi.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/eba7f2cd1d519403d8c06c221d40da59/46797929210.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/12b78d2bb22952ce69f1379c43d329d9/pitesizeva.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/11706429575.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/13483753100.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/868fpnhk70c6cbvc6nucj3d9u1/13025607954.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/jexumodeginabofu.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/pimesutanuduvowoxa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92e471dc0---23960278592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=arduino+projects+book+amazonPDF 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_off0000be8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8D 15008 bytes
SHA-256: ce6cad3a3b616dd2b58c51dbb0e9c54b48df5daf0af5230bec944f8fea441e11
font_01_sfnt_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 11132 bytes
SHA-256: 9783e5264d9b05147573a3d86934564bb4fa1a40e15a523a02b4a4b644e24287

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