Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aab6d172cda9cd2…

MALICIOUS

PDF

78.5 KB Created: 2021-06-09 04:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e2b5071109be1d6cb00e1782e80016c5 SHA-1: 26e60f4dcdee2c8534573c90f6fa374b14374d07 SHA-256: 9aab6d172cda9cd246f32ff4a6edf3a100c666072b5be55b1a741cada89ad6b9
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious and a phishing trojan by ClamAV. It contains numerous links to compromised WordPress sites, likely serving as a distribution point for unwanted software such as KMSPico installers. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or software-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=kmspico+installer+office+2013 PDF link annotation
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/16acad2d78e31f3c998d4422ad5e4435/poledopebelasomivam.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/h5ha1cungovsa6uiq9l5hpdv87/45000904937.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c8b8bf018---58504839589.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3bae15af---kelenuzanukefu.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/nuligajid.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b0bdef0a.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/9a483a755744501f7d59400e138778e6/45248914195.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc84c15bd4---67891216586.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/movosuruzugikulobozitusi.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/df8huvbih8qbsa4i65ulph2ob0/38111069454.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb1c4980b7---xenojo.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/3008461ea16d5bd065b515c206bea7d4/nojixutirigupuk.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199482471126.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607db35e516b9---zifujeledixakagud.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/neravobijili.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607609abf1106---25912871068.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/72327884633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 5620 bytes
SHA-256: 7ab1bb4f3d4be91123558a4c5cc9a31cbb96591d494018a0d7c3ab4211d54079
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00010451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10451 12640 bytes
SHA-256: 16e457ffb834ba24ed662a06c3e01190e3ecc853b4f3b4a0cd4d4d33763dd68c