Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5a5015fe4bb0ba…

MALICIOUS

PDF

76.5 KB Created: 2021-06-14 21:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0b8e1f369b87783617ca9897f5c76b SHA-1: 57190d3a1a025ed2a9d6f3f1fa0822f90b71a94d SHA-256: ba5a5015fe4bb0ba2abda4fec432210576f9b4e93e2b8c2009b3721aa7c9aecf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of a URL with 'download fortnite aimbot' suggests a lure for potentially unwanted or malicious software. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://oniceh.ru/uplcv?utm_term=download+fortnite+aimbot
    • http://strategie-online.net/catalogue_dynamique/file/29390269359.pdf
    • https://grandplaza.bg/uploads/assets/file/54592499667.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/d14b59f90c1b0b75ba2916a2eb03c6b3/62460258749.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7cc3ce58---34326832776.pdf
    • https://4appsoftware.it/file/28810552469.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2c6bf55c---65856096726.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/pph65gnu4vbqejdlbhro8uk201/gulirironejebufigekajoj.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160741aa26cfe2---70693237459.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/e76o83tuqufoddb1hbk5ccgfh1/71541990258.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0m0s1tudtnfo7odg8dvehbo3nt/kiwigoradox.pdf
    • https://fablab808.com/nbloom/fckuploads/file/voduxorurapixika.pdf
    • http://erfaspot.com/resimler/files/55309646329.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844849e649---44444423411.pdf
    • http://scbczy.cn/up_files/file/20210604_202843.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8fc73dcec---biwudovukiviwixedow.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/s71g8pl9cpih16plis4k2c56h6/lenokuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef54.bin
9eeb3a0ed63c5efb9528d938c13c1e47beca0e6785b06bd5ad50513cf2180036		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5108 bytes
font_01_sfnt_off000100b5.bin
93e3d80df42c742e5d2e0c3e9b9ed2e3c5cb45dc9b62b228ca7cee30f7d72dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10644 bytes

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