Malicious PDF — malware analysis report

Static analysis result for SHA-256 35417b260a7ae911…

MALICIOUS

PDF

112.2 KB Created: 2021-08-23 17:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb6e3dc274ebb464ca21762a069415af SHA-1: 6a5e579dcc3665a6cc940cfa9473d5b8cd02272e SHA-256: 35417b260a7ae911e2d76c9c9d5f4629429eec44a1c3a23239531d4269445531
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous URLs, many pointing to disposable hosting or compromised sites, strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/vuwunumidadinimonug.pdf In PDF document text
    • http://laserinnsbruck.com/static/30925758352.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091433d6e7b8---77047625583.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/88537598747.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/wititukewi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de95654e7c---36173247930.pdfIn PDF document text
    • http://mp-journal.com/media/file/zasosemejazifadusotexux.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/81304884475.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/eb7298fe2c31518851a161105629775a/putofeliru.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607f477accd5c---55023673962.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83a892dd1e---bitanaxuzatepagil.pdfIn PDF document text
    • http://biosite.ru/images/news/file/bedesepupigabel.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/fatefugerezedu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7263ba12---zupavegefaxunirup.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/gazufipafarabiwoxax.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/54021164174.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/22663085648.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d0cb8ddf---23315569035.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/0b8dc2f8fa586e9bade10e8a9dc8264e/lopozesiz.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/jozitamerejutolelej.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160907a095e724---76344953383.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/48208518328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=oedipus+the+king+onlinePDF 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

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_off00015159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15159 10628 bytes
SHA-256: 7f644b15dea67600af3fa0049dc7fdfdb78df5b4d30a4c59f949203c02e2a219
font_01_sfnt_off00016962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16962 19092 bytes
SHA-256: f23f39b6759156a8bc7bfa0025161551677376241cc1445dedb9d8b27976c28e
font_02_sfnt_off00019aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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