Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b80c17303f31aa…

MALICIOUS

PDF

150.7 KB Created: 2021-08-21 01:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: f6e5c3c095ce3d797305ec91efe3d88e SHA-1: acd87b4d8f4a2886fa2dc80479bfafe7056e750a SHA-256: f0b80c17303f31aa282e7e80cee1b617b105bfc115574a2916fb037fca0e669a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://itacademyindia.com/ckfinder/userfiles/files/40251994705.pdf In PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e7f9f4a8a29---15305863903.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/vunipogefefiwomuru.pdfIn PDF document text
    • https://mfdesign.hu/files/file/zemizuxifamonepufamedo.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/19/file/20210619_135327_200.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5b61dc890---96942287110.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/92248550138.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0ec2b6196---13006388439.pdfIn PDF document text
    • https://toocapen.com/files/31093709489.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6f67e100e9a1afe565896123063aa01b/zujol.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ujgrbgkqv8ncbla76i5553gbka/72937603035.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/89708848098.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a85bc5368---nulogikusudewekuposukexos.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/81522684504.pdfIn PDF document text
    • https://beaszemin.com/files/towebalirolakegu.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/41236cbf0ad2b165fbb8d1f0ca54f763/55431088087.pdfIn PDF document text
    • http://accronline.com/userfiles/file/4758202498.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/88239520761.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/74365257081.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/sqtg2v9mst4nde9d65mgdjurlc/24670041254.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/be48b4e49a63c13f701d42203687ceea/93398487088.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16107a4614f5b3---nevorigope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=classical+dynamics+of+particles+and+systems+%285th+edition%29-+solutions+manual+-+marion+%26+thorntonPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD3C 11456 bytes
SHA-256: 2f2609551a3fd62e820e3204d9e1a82a3c1d6f8bd4b6f8858b7bf6aacdefd063
font_01_sfnt_off0001d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D854 21832 bytes
SHA-256: 46bcb2887142c317cfbee6980284062d06afd842eb063d54222691a3f9df95eb
font_02_sfnt_off0002133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2133C 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_03_sfnt_off0002289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2289A 1840 bytes
SHA-256: 7a20f55456e96d8dc46895b9fceb491285db744b59f33aa823d9adf72e61a80e
font_04_sfnt_off000231f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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