Malicious PDF — malware analysis report

Static analysis result for SHA-256 006cb651aa66bfe4…

MALICIOUS

PDF

109.4 KB Created: 2021-07-01 19:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a8469b88061eb92b61922d15af8732db SHA-1: fc9daf2d8b2a68e554e161c38c2411a999a63c5b SHA-256: 006cb651aa66bfe49acbd630d8f154fc9d914173924a93f129d69d7bd1344dd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous external URLs, many hosted on compromised or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://kisikana.hr/userfiles/file/15734303452.pdf In PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093d30e1f275---xapusoxiwujawenix.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/gixibofafijomije.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc0bdcee6---padugikogapoloj.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d27e6f137c168a2030094c178bd5bd56/piwipajudewini.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/e962va1ct5c35qpjph85kiffi1/79169981090.pdfIn PDF document text
    • http://clingac.com/d/files/33536341279.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e27fd767f4ba600581166cd126342e98/83931153750.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20216271513202186.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c4b076bdcaeaf9601ae9c706eec7a114/poroverowafulat.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/8483124638.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa72482e8d---36893891605.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/ea329d7016b0d08fe6177468934ad5df/42266856181.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b72d340683---xelopeguvuk.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609100bc523e1---86084164985.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/deruresipo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7846c4415---69186185241.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/r82biqdv6qe9a0lre67j1d3emm/6104769578.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dqcfe5o75obqirut4jiu8aceif/tejobose.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o3v4lvuobo13gh91l1vr92mrl7/zasusosoregaxonetagevalu.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94904b923---filotegaxezemizulav.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/69887184248.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/18646602817.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd094cbc1---93392696019.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/fec2cce7c28d885dbe279b03b061a73a/30331032265.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/18777277507.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4e9002178---tawanujagakimufujugoxudaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=yards+to+feet+conversion+calculatorPDF 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_off00014aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEA 17172 bytes
SHA-256: be1b48daf831e3243ad18679b8bde123f225c3cee01ff6288afc38cae1c5e40c
font_01_sfnt_off000177c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C6 10616 bytes
SHA-256: b7714d528eba511907895a17b70a81a8f4e0deb7514965e33e227b851619c6d7
font_02_sfnt_off0001902c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1902C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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