Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebea4d5e2ae9ff4a…

MALICIOUS

PDF

81.6 KB Created: 2021-09-21 17:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 415a868bb9b140bafdd5bb305d8d5d34 SHA-1: ab977a968f97c898d43907f9d304f61bcb667245 SHA-256: ebea4d5e2ae9ff4a61cb6dc6cb1917bc734d1d5d19be6db13647cda21e761bdb
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were directly extracted, the ML classifier strongly flagged this PDF as malicious, and the overall structure points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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://coretry.ru/uplcv?utm_term=c%23+fundamentals+for+absolute+beginners+pdf PDF link annotation
    • http://apartmany.cucoriedka.sk/data/files/melitajajisil.pdfIn PDF document text
    • http://ip-kamery.cz/files/file/88968934546.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16142ce1fcde75---68568860563.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/74046151635.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/jiwajozexusorum.pdfIn PDF document text
    • http://come2menorca.com/images/file/wetuloj.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/najebibalaw.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/90917854659.pdfIn PDF document text
    • http://halaljones.com/uploads/files/6092938968.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kuxuviwibaduvep.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c2d5e1e60b901f00721a9ed9fe281134/71186078825.pdfIn PDF document text
    • http://metzgerei-bischof.de/userfiles/file/werad.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/loxifamomo.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/82538424888.pdfIn PDF document text
    • http://cataga.de/beta/files/file/dajizividufi.pdfIn PDF document text
    • http://tunguoilon.tunhua.vn/ipp/images/uploads/files/nubebixeverukekilusol.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ea007b21c---74314074213.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/fulesilaka.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ac69f3d5ea99f5fb00c16810dca9f5d/26200294963.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/06/76814112361.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/77921861435.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/vogideje.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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 18320 bytes
SHA-256: 46582fd8eec2cae58653088f02f279da2697cba9db47f22d40bc31a115731607
font_01_sfnt_off00010e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804

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