Malicious PDF — malware analysis report

Static analysis result for SHA-256 e228015caf9a3b38…

MALICIOUS

PDF

85.4 KB Created: 2021-07-16 03:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 37f2dc86e99aeaff2eebee1c37b3bc99 SHA-1: 3d5d48a785aba44a12a95af950a8354ad569f964 SHA-256: e228015caf9a3b384555c8a3cf18cfee93db318d0825b52af003bba106b19246
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a payment redirection or bank detail change lure. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160799b1346afd---41703868603.pdf In PDF document text
    • https://qqhanoman.com/contents//files/33525124633.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb71c21e79---78010373639.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/451aa34baafc1f316299dc45bb57bad4/47502247721.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075464182610---31339650434.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/zawesetopadalos.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c01c42621e4---wadogotewuredebaburi.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/buxono.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dv74aavae5a4mgv8l2lchk1j63/vodolasitizeduwulil.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/14853378913.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/94823127614.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021061610502257.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/84585533863.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/t6pr9sttc59kl7mebtepoje9oc/vefekerumi.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/72476032704.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/76004305563.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/24a78fa45dc1903d8ac41f75aef6af19/67220179880.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/obnc3nan3qu7itr7vea472q323/bubomubuk.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/44707197961.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/juribiguwataz.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/83458346950.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/17097519971.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077891ff2081---lerol.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/fidobovixejir.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105170045.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094909b105b7---junel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=converting+nre+to+resident+accountPDF link annotation
    • 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_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 17340 bytes
SHA-256: 159c848ada41536a9aa56e0805cbad4622433d81c36b72367d4815fe1459b709
font_02_sfnt_off00012fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB0 10696 bytes
SHA-256: cbaa73ac34344a3b93d64304b3e867ac6e482afbf76d8791c7680a6ca0585b4f