Malicious PDF — malware analysis report

Static analysis result for SHA-256 120d518d8b3162aa…

MALICIOUS

PDF

67.7 KB Created: 2021-05-14 05:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1730b55ad0d63d1920485784e792408b SHA-1: d0cad5b8b6e0ea05c3ee9a59508ae1b842312aaf SHA-256: 120d518d8b3162aa6352e1c4bcc4e29229c0c7f557ddd9ace2ec3254ae26c95b
156 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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://irlanc.ru/uplcv?utm_term=baba+song+whatsapp+status PDF link annotation
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afe48eaee0---20725594692.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c828c82595---zonitigavaku.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/67356650624.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/v8u2t3t2phmeql57d0htadhimv/gijekutawifirogekedu.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/171a55f95731477101db01066262a547/65630970027.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8fqdr54hnbj5pm8quo3fgqcqk6/57984032819.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/1f6a576cd7a2c1c98b007c801dd11197/zilukotasutigisirupof.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073e810b74ae---4798850926.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/bpk7fb1u0b65i2q9q9tq2a2t51/31476489430.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddeb16128---xodakapukozikuge.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/13ea16d7d2a0e255cbd8713481c706fe/80796454544.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/cef1e27271a568d8f91b8d851ef84630/vesiwoxogofofav.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d49f52f2d---lazamosod.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070709e28495---60090728391.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/61fb43d888629de36947fe6370bb35fe/nopow.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/8204f8dba8b09c17eb501daa904ed4fd/tefazizafagepezib.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e56d8b90fbf8a11313458d4924d414c8/71847549223.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/bexowisekirejezik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 5232 bytes
SHA-256: f72ab697b2cd845e26b1bc5d4bca2633b463e003c10dd302832571dc0b67162f
font_01_sfnt_off0000de5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 9944 bytes
SHA-256: 539819d2be491c778ad5602c78dd781a1cdb9981f3cb5dda0791b2af73893bff

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