Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c7443128cb4f0b…

MALICIOUS

PDF

103.1 KB Created: 2021-06-29 01:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6019f9c22356d2ac59e2de893cd38af4 SHA-1: 0fac8cc8af5d6e8132d66f0c7591013c1c1a20f4 SHA-256: 69c7443128cb4f0b0ff0e114ff00d01b5013b20a87e0de70f8b15cc46b8ac467
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c17558e31---sitibajiguniv.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609840c5183aa---85645969872.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae470fbaa07---budigamijitat.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e149ffd9f5cffde0e6830f145d42a30b/fifokukuzikemosoteli.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/bavoxevesuzurobi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb89dc4b5a---mokijiwemawezop.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/07d6853a8d8eb124d3577436e25a726d/48434143611.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2cdd3f31---foweguvadegupe.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/dunawijaw.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/34ce0454fcc1e0a0619b917b4fa8bbb6/44640932353.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/70847990014.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/widivavijepomigorebibixo.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085485972e29---87829248063.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f4daf086620c3e6e452cb12348cf272d/zumakaxuwuxoju.pdfIn PDF document text
    • http://absigorta.com/E/file/6453799853.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce77ab5a5---judema.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d96985a99ec0e162fa1e4d83f6cd8c70/fanuwetemaxo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/h7qa4mojh6h169599tlgmgf4gc/sisomegapevoz.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608761a5aafef---48931588410.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4dd287ed45---kanukuwimozemofewap.pdfIn PDF document text
    • http://benthanhfarm.com/images/uploads/files/dimonomovegezovadedir.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/38779452588.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/cd6v6avjhv0hh1uc9bp3d73sft/donitox.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ii8a3ksthdj01h4qujepc0ns4g/43267144382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=meaning+of+jennicaPDF 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
stream_006_off00016f1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F1D 18776 bytes
SHA-256: e2bd379e696998f89cfdd671c820b87ca78c6ab5ada4be8c0ea262df4bce06c4
font_00_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_01_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 23872 bytes
SHA-256: 830642edab98bb813d5ce85e04845c647fa56c22096e005e2f97a8703258f15e
font_02_sfnt_off00014009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14009 10224 bytes
SHA-256: 5efc25aa2a537c29275700c6e40473a623c1504e7bca7d22258373ae54758e68
font_03_sfnt_off0001570c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1570C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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