Malicious PDF — malware analysis report

Static analysis result for SHA-256 e620e0f8727cb95b…

MALICIOUS

PDF

65.3 KB Created: 2021-06-11 14:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 129ae12d9b4e0356bde0ad16040c54de SHA-1: 3ceb6f4a89147673e78bc6482191916480c0a8f9 SHA-256: e620e0f8727cb95bf11b8eef213a739e6dce633c5a22b2597acfdd31edc3395a
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The document body and extracted URLs suggest a lure related to 'Fortnite skin swapper download', directing users to a compromised WordPress site. The presence of external URIs and link farms on potentially disposable hosting further supports a malicious intent to redirect users to harmful content.

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://pistant.ru/uplcv?utm_term=fortnite+skin+swapper+download PDF link annotation
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a37ebba0942---4910237120.pdfIn PDF document text
    • http://paliukenas.lt/i/File/44691068441.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/76653180487.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/91c47b64840bbe5db944a98651bfb446/76216456811.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609fcd089c66a---jenilatixiz.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/91d896d43866c3fda9002aff9b81229a/gibijofulegokazebak.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/loduzofugaruwagef.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/ueia91a99rmampevrnqfnddo6u/51411693628.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eb7b5f609---68859600501.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/559edika0habo1q38s98eussh0/pomubinom.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f2e327e6ad7f25db5d543f90b91aebeb/kevusiwopaw.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a9a0d8c3---voxovowunoroduxutetix.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160964821e0bb2---xapamatenizanulenur.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_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 5064 bytes
SHA-256: b1bbafda75e78305f4e2f0fb4affee7c320898632f6d762397621b0c06419536
font_01_sfnt_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 10048 bytes
SHA-256: bb3d97a311ed29f5c3ad389cb184f34e13e279571346b85848dde0d45aa8defe

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