Malicious PDF — malware analysis report

Static analysis result for SHA-256 824e469664285e72…

MALICIOUS

PDF

77.7 KB Created: 2021-09-01 05:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 98f3f3f447827968ca2cedce92aedebe SHA-1: 65928d6275605eba45e5c2645800580805875f85 SHA-256: 824e469664285e720fdf1fb1f00918c6bbd760708a9be41bb1f7ea53fa6d79f2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nicolalazzarotto.com/userfiles/files/xekeximewex.pdf In PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/14864829684.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/2311387989.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/56466136246.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/e75953935adf8bb2991e578858d64b86/57041388722.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021071818595_528137187.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/bejigagifan.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/kawamuxudasi.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115669f2dc53---3713709929.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/7bokihj2em3dkve975nvavco5l/vawiwud.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ac7826ea20---dudewosederolujopagotima.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4534c0973e---13119515449.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607836378fac3---83046542002.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/giwowepa.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607105072b82e---42396469545.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/watedelomis.pdfIn PDF document text
    • http://maydangson.com/vietkiendo/upload/file/46191169690.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/381668045c5e5c593c038300d2505872/podabebofenikugilovejiri.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/59318346074.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/lavena.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/89553440138.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/af1f444d8cbe27416d2afa6d7516e880/93514595625.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/31763289277.pdfIn PDF document text
    • http://vejwun.cz/images/ludisube.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37059248d1---zanujixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=oedema+is+due+toPDF 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_off0000ce89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE89 16908 bytes
SHA-256: 8a7c55371b903455271c21bd97f70c6cd6f0b2ed8cdf708ed3683aa9844e82d8
font_01_sfnt_off0000f9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D9 10284 bytes
SHA-256: b51101e3ff738d1d8d7a8160ed66db761be0933b728c6fd9a8128bda71863b6e

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