Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ca7402afdeddb8…

MALICIOUS

PDF

76.1 KB Created: 2021-09-01 06:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 707683f0b7fc9042cc734b2613ef2319 SHA-1: b36befe1fcb36e05796490449dd0f190706786b8 SHA-256: d1ca7402afdeddb8601afe8ec350f0f75f93ff25c194e28c05fac3411900fa3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document has been identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=a+refrigerator+placed+in+a+room+at+300k PDF link annotation
    • http://win-sonic.com/kida2018/ck_imgs/files/kapolutipunusoxezetegafoj.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acae76612f8---wabagudivawexijufomuv.pdfIn PDF document text
    • https://umartravel.com/files/45859913932.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/15036908218.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/u85hnlkav4m8ee2d6kaco4t7qm/piwulit.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/72897970356.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4f5f1d528e380fa3ea4c34afc9c2f317/53269608344.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/xabowuxi.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/mesadulukexozerajupiwi.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7527ee022---29809674130.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/tizarujajotivozit.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/jomaz.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a8797d04c3743eda4abac86a2a665da/43744652603.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e56442cbf---puwofipexamefobeti.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/juxexigi.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/dogesepebuzot.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5bb7f7551ad3f1958e63d5f29c6553fb/20006929099.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/98881776124.pdfIn PDF document text
    • http://didopack.com/files/57758787033.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/inaamjugln68nfhobqbnqb6i99/xasufugoxodivasasitila.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/67281339370.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/fupulatuzujiref.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/dudusinir.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/jedopereborawepagikukowo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2bfa55a3e9---84974611047.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_off0000c3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D4 16988 bytes
SHA-256: e02819d7bb47a3e6407fba0ee0289d78bcb9ec3f1411df9596389902804ed5c4
font_01_sfnt_off0000ef2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 11164 bytes
SHA-256: 990b9a4a8a24b2dd5499dd465497892d2af78adec08c93ffb5a17c99ff946138