Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae30e78560930ea…

MALICIOUS

PDF

88.4 KB Created: 2021-08-15 18:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dcef33c1ac431fd9b514fb6d11b4225c SHA-1: a78fd8bb930f6caedee9f5e805e87220574ec462 SHA-256: 1ae30e78560930ea6101ca0f348e7d79e73765dc6122cd31857defd8d1e9a47d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised CMS upload storage, suggesting it's part of a link farm designed to lure users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ketchas.ru/uplcv?utm_term=pokemon+x+and+y+cheats+rare+candy+citra PDF link annotation
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609637a32b865---17474828971.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/68016514822.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b8cb91187---66446961329.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/naxidulajugagi.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/kuded.pdfIn PDF document text
    • https://amblamy.ee/upload/file/29746667113.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ff79bc0d9.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fcda85826---votirisuraxarowilisuki.pdfIn PDF document text
    • http://cuatudongsaigon.net/uploads/files/37907125604.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/kovowa.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ada91cf77---7174718245.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160971e1f3f4bd---niwisozufotavajugafad.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/73579420569.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/3de904c7c75de72a0b35300f6e3e33c9/78409947375.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bd8fe754ddb2d962a2b25746e02f2050/43539545224.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f39092fcd8fd4fea6880247879268846/92243113901.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/93550661972.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/qtemgj8fuof7a1tno0bs6nahq1/wakutivotatozozamidikoni.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99609745f3---73299030992.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/64764833020.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609904476602f---tigokunuzezasodatane.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/80508617177.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 19188 bytes
SHA-256: 340c7d79f783208c6a952a8cbcf612144b8432904f4eea7b87059b754ef81542
font_01_sfnt_off00010c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C53 10900 bytes
SHA-256: b60032852bec9d8cde1f9ff6deb36c789ea9a3b84e9daa041f3413da99307b6f
font_02_sfnt_off00012568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_03_sfnt_off00013ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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