Malicious PDF — malware analysis report

Static analysis result for SHA-256 652b3f8c94ed6b27…

MALICIOUS

PDF

82.4 KB Created: 2021-09-04 15:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b84043e51cb2fb8cc81820ca293cd0cf SHA-1: 759ab7f3466e2fd429a9f99c662650a2eeb252c9 SHA-256: 652b3f8c94ed6b2730013a476039532358e8d7c2537c5afe8c680278db595002
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a deliberate attempt to create a link farm for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=thermal+physics+and+solar+energy+pdf PDF link annotation
    • http://marketherballize.com/ckfinder/userfiles/files/tebifitademeketem.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a8738b9b---fuwurobe.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/molimibuwiferapopisa.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/lefogasonus.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/60253183350.pdfIn PDF document text
    • http://atek-ent.com/upload/file/lilukin.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8eb316fab089760828f96d97d01018f9/fejasafogagezuxeminomabox.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3034436f3782a23b8c3266b9557cd9a3/viwukofuturufik.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9c01a2b93e5c4b1c2e78c026dfc71364/rewosuvajuz.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/jojuzominipawamixuwugeja.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/kezabunatinu.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/79397958396.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/40940476763.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gmc6usa2am8spa283ajlchu1ru/54544938380.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee3076343a---61446709399.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/11d8702c9c33efe2158253a807565345/44626220832.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/815afa7b113a5cffbe0d77174db091e9/36279709795.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/1b990c932d3a6bc7c9b23f6b0d7de0d4/92106839232.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff55ab9bf2---teruwuvofapokujemesibiwel.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/d9fe9c49da6a7cb826545a96d241bea6/43180632695.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/68989987960.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f23413c5ea---wemedowonesatesexetezuxa.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/8iosfs6549sbv9uqpk9pepc8rg/rivofupu.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/65577401079.pdfIn PDF document text
    • http://3asoft.vn/img/files/xuxesome.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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 11044 bytes
SHA-256: b7a98958f2007755d1c72717b3ead3e9851cd3799295e0e109703bf4339a2a30
font_02_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 17864 bytes
SHA-256: 6dd43df10d40aa26224cfa566b18ccb4a433e2acd05c948a2ce5eed38a2a7332

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