Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dc48e3455dd255…

MALICIOUS

PDF

82.6 KB Created: 2021-09-01 01:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 66e5ae0be1390a3f81faf95ebebe7200 SHA-1: e512863e6e37965bc583da951ece5a57571e602a SHA-256: e9dc48e3455dd255c0b8e4513553d971e5659b180ae3ab96e705667043061c48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The PDF's structure and embedded links indicate an attempt to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee951c57bd---rufozor.pdf In PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f0ba20cb975232916a205fffbe9e4cc7/96867599495.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e8305ff1208---46537081873.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/48794444219.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/13085978638.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/65447816122.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/jopivimenexasowevinigareg.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/wajujifezuvilekekafejere.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/63301523151.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/89338733420.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160981523eb86f---3183555784.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/62701813045.pdfIn PDF document text
    • http://faradbox.pl/files/file/82848990863.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///85347924031.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1997581ccc---74408160484.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/boxeruwonivununol.pdfIn PDF document text
    • http://dogninja.com/userfiles/files/fepapomosowenefatebuge.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/futecf1fasvr8i9em9n87k8jm7/24680488516.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/13259684068.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/d23kncvdtc5sd62v3henha7frvr6fml3/wugutupuvimanumuw.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/89423323071.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/12375820794.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c792809c7---88578228560.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/gefojanog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=treat+shortness+of+breath+at+homePDF 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_off0000e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 10444 bytes
SHA-256: 5377323cce290cc40e794aecb1e19b3ce177c1aaed88d75abcded552d32b0758
font_01_sfnt_off0000f87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 17200 bytes
SHA-256: 7a5b410060ecadcaf83465316f4f881dc5b722885d679c53760cf7d308d5ddba
font_02_sfnt_off00012492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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