Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8468c6dbcc568c7…

MALICIOUS

PDF

86.8 KB Created: 2021-09-07 17:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5bd5cf04e76cfe15736ce48c4d38efdb SHA-1: 546eb87b8b6f37e73dd38936ee35c18fee6c0467 SHA-256: a8468c6dbcc568c7461d1ba3305ecd7a529a78bf825c1bcf2319fe99aa2ed54a
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits multiple indicators of malicious activity, including ML classification, a password-protected archive lure, and an MFA harvesting lure. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=corporation+bank+internet+banking+form+pdf', suggest a phishing attempt, likely to steal credentials or abuse multi-factor authentication. The document's structure and heuristics point towards it being a component of a phishing campaign, potentially leading to the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drafthe.ru/uplcv?utm_term=corporation+bank+internet+banking+form+pdf PDF link annotation
    • http://dancephoto.ru/userfiles/files/85591158342.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2178d93a---jememugipigob.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/76569669119.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b591b2b67f---60025150844.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/16165509120.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/sipepasotapijejaxomep.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/duzibisisujidok.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73813637b---jowudalajuxebevowukonolu.pdfIn PDF document text
    • https://bem-sa.com/img/file/99471744002.pdfIn PDF document text
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/mixige.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e3c10a35---4096635649.pdfIn PDF document text
    • http://evola.it/userfiles/files/xosunodepumomogubixezup.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612ae7be8a814---82329629835.pdfIn PDF document text
    • http://szm.hu/userfiles/file/96569847009.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///82968825846.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/47898688160.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/71405943697.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/77421859530.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/33130337886.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2a934aa0---29642210773.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/56711897827.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/porovadegelovil.pdfIn PDF document text
    • https://0900107678.com/upload/file/25532046701.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/dofexesobawodo.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/mefelufusurunin.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_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 10888 bytes
SHA-256: 3b8744dc4bef68df918d8256f06ea75d32c3761f7d858ac6d4a2943468d83846
font_02_sfnt_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 18364 bytes
SHA-256: e77b5f279ee2021cb464a1d3adee312e50a876dea97922b4ec4bd4b6948dbfd8

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