Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24fa63a47188354…

MALICIOUS

PDF

93.7 KB Created: 2021-07-18 12:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a7bfbd51d5cae31972159a10418ee75a SHA-1: d4f37523c6fe7f5e147751a04a98fe28a07df1ad SHA-256: d24fa63a471883545689bb8b1b95a8299fbbdb7842f96cb2034439cc1cdf5699
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3557

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://xn--h49al33a2zdp0eo1x.com/DATA/file/20210517140701.pdf In PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b077b13a15---95850790344.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e9114caa9---kosozobadomitovop.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/aedd7073b7164a86022c8897a0c275bc/79559235642.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e7e7697b1---82382807876.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4aabda2d53a99c1c9dc51b15f6725b88/wexad.pdfIn PDF document text
    • https://raljob.com/userfiles/file/fobirenajotejezogakuduput.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/tfvvc2657qf6i58qi79aeep104/wexopofewopunekusitavu.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/42499756547.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e448007aa3d---34150631781.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/gafumonotijijolegiwavawef.pdfIn PDF document text
    • http://dringraldi.com/clients/7/73/73ccc230e5ee2b020474e4a43bcd07af/File/83871768558.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/xetutajatumefezevepawab.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cfc687f9c---10492122767.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/80001171589.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/vudolizerizot.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/5259536982.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/zodupasutibatepebovodiwe.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/36402882719.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a328c33c53e---kejotijesefatuvitoxiz.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/lufusizimex.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/86260411683.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f82bbef032---39636866390.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/sitobemepekebutogenaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=meaning+of+billowing+in+englishPDF link annotation
    • 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
stream_005_off00014316.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14316 18916 bytes
SHA-256: 74d3afadaaa3ba47ed01a84e353c6524bb199812f61362da64dc6a8af2283028
font_00_sfnt_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 25760 bytes
SHA-256: c3afc15973a1c13bc41e087541306a482ab81471f7d2f70d1b1d08313fde7fe3
font_01_sfnt_off00011321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11321 10512 bytes
SHA-256: be3552d29eee07e099d9d52873d797029a5e3c0b8ef1d4d6544be5521c7bef35
font_02_sfnt_off00012b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16267 4268 bytes
SHA-256: 55d4b3728cdecc7e1c97dae005881f5cbce8ffe1f998039857e3fe7ac614011d

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