Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6e701c4ccf219d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-11 18:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 248c227030e7caef54c001bdf41651ae SHA-1: c98816bfc93d2cbb9fd3e39dd435c670cc33617f SHA-256: fd6e701c4ccf219d485f39cc02552692bb38219c0643cf5f927c30311129c99e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or redirection attempt. ML and ClamAV detections confirm its malicious nature, likely exploiting PDF vulnerabilities to redirect users. No scripts were extracted, but the structure suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://zebcom.in/userfiles/file/tefavok.pdf In PDF document text
    • http://huemin.com/fckeditor/userfiles/file/76830507617.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/98836170009.pdfIn PDF document text
    • http://imaginove.eu/data/Files/lurifexivafivavaf.pdfIn PDF document text
    • http://china-miyaco.com/img/file/20219242122.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/33145125154.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/75347915356.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/ragexi.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/36480527532.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210904130012.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/39594398223.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c369e6fcb1d2441bd19eb60f344dc003/wakabafofav.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///2499132954.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/75124681674.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/71949545371.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/37900329624.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/80913548328.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/xatufilo.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/firolipa.pdfIn PDF document text
    • http://konberdbio.com/upload/files/59491849508.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/dekikesosimalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=stop+surviving+start+fighting+free+pdfPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/79323060907.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD659 18316 bytes
SHA-256: 7aa59b8302c10c7ed60771496e564ef5ba5e7da890445c75583601fe93e7bda1
font_01_sfnt_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 10972 bytes
SHA-256: 1d877f1cfd814a64ceda5cfb4fd69683922b1648ccb38e6ec388c941d7fe49f0
font_02_sfnt_off00011faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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