Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fd056573e43e33…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 06:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d8fa792722aebc6f672830df51308411 SHA-1: 9709255093fc1463cea34fd7caed7bc7565996dc SHA-256: 16fd056573e43e33a841146cb2552dd6c043bad0b430dc31dd93c0496130a468
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/20138412631.pdf In PDF document text
    • https://korovin.org/site/img_ufiles/sexufikadowenabage.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/xedoxozibuxe.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/woxajitiduzuvitepu.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/4115446012.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/78859935039.pdfIn PDF document text
    • http://thehouseproduction.net/file/lajabebutixozade.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/felebizeb.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/sixopama.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330e0796c76---xejij.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210906131828.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/medexal.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/72589177060.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/75018483602.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/97787041993.pdfIn PDF document text
    • http://dralituncer.com/userfiles/file/doterukiwifot.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/8936401482.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/jewelubiburuvowemevup.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/zolinijerakuda.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/19232700637.pdfIn PDF document text
    • https://europartner2.pl/uploads/gigudekisusujuvisiw.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/55194374521.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/57573181274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=hsmtmts+season+1+online+freePDF 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_off0000d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 17372 bytes
SHA-256: d1fc428c24fa81bbe4f43eee11656d3a66d3d3fb3bf26284d2fd96e806948672
font_01_sfnt_off000105be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 10416 bytes
SHA-256: 9dd52e73a5fdecccc374b511bd0211da40df0916a3686829bee73e69b4ff2dc8

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