Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2374d209d9dede…

MALICIOUS

PDF

88.5 KB Created: 2021-06-30 18:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 509e9e5eb0374b343a71f70f2465393f SHA-1: 7f6c0fd88fa239f32ce8df934b9b896b174ff3d7 SHA-256: fd2374d209d9deded35b2b6fa677a5ae1533c978fb21ebb8868d25549b5083c4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting. These links likely serve as redirects to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=god+knows+us+by+name+verse PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb727e3650---75165337855.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a04e1d769---jinoganadis.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/makixamuzonopidijon.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6771c3523208dab5b153eabcd20b51b2/lewededewuzipivamu.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/jaxofawutizivawamisegaxus.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/54827342452.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/1c903c7f1a1ca1abc93886696b48792d/bibiwuzanuk.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/k2eotkgvh179t9attams5tob7t/parowofugifetaxeja.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160881c00eccf9---garopimo.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/2lfps9ipu3o33g06ajfvgou4j1/titoxazisuwa.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/rafawedavilomazuwavufuz.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cda0875dbfc67301055124cc07cb38e9/37126516907.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/garofiliriw.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/g2j1ii6i5qtbe0q4nrbjdfr5a4/63461693876.pdfIn PDF document text
    • https://cecprint.com/images/file/bemusojudoriromo.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/99ed99472068081e4078989b2557da87/popejabesuwuz.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1374ade23---guzupomi.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215151646418578.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/af427b6d531c45a599138d835a837ab0/31966572294.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f5b01f7444254e75e1f5e3a8c9e8c75b/nakekopigajilijoninelija.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9053685aadc410a81eb911da47817c34/31012774568.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_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 17336 bytes
SHA-256: c8f33f02fabc0f8b0239843177e936ca5a4de2a996aeb1e12f4b519a60fa86a3
font_02_sfnt_off00013bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF5 10808 bytes
SHA-256: 5ce3861c279254123f59dcdf2e3574016b4a834810d612d23af58c4ad3c6fc46

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