Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b140de74e8ee9c4…

MALICIOUS

PDF

89.2 KB Created: 2021-06-30 10:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c0cd033a0da6e9010efa4ced7c14c4b9 SHA-1: cf527bb45f4fb7a1d5667fc566c2adf97829b854 SHA-256: 1b140de74e8ee9c47cced56353a82748f0e4e9b17bf594390306ef7632370901
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or SEO poisoning campaign. The presence of multiple external URIs and links to compromised CMS uploads indicates a high likelihood of malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://smidgel.ru/uplcv?utm_term=in+home+aba+therapy+near+me PDF link annotation
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/dc8f76210a2c8a094711d683e6dc2a0e/degidilixirikododetel.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4390028057---54680761102.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c504ca45fe657006bd6bcf17bdc90743/24971226671.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606faafd11326---xezisatononedipolux.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/91157606973.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/55c2bb20cb905b2c8df84b1563d6c547/23044304206.pdfIn PDF document text
    • http://sciattella.net/images/file/85721223691.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/qucul069195m44jrig97n90trq/lowamewutajunijofusuxo.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/nukibalakebesudesas.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3ac3c2ff80f443f8bd7b137b3dd58eb2/ralisobusolemij.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16098846b8e1fc---76098944380.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b57de5f2b---lovulukafawoxu.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e66a16b97b---25901416854.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/71212380202.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/nipusokuvewuta.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4e1088115de49bbf6104a91ddcc15fe/lujuxukobuzivofefe.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/jopogapidoxose.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/s4shoipd1g565delg1gk48c4gg/22884998213.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/18133904309.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810b76763d7---92814384270.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/15118943428.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/3249c9c81a682e7871ad4414031291bf/xotimovokamesa.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160964219ec616---1838694341.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 16992 bytes
SHA-256: 5e91b4103cd034a838544def3e244162ee4ff3a4894018453e2f809f8fb06ea3
font_01_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14045 10416 bytes
SHA-256: a4de033b9f8709e901851c5eb7a53f9162d06294b216cbcaeed3b67366c15362

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