Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bb3737af5c7ae8…

MALICIOUS

PDF

72.2 KB Created: 2021-09-01 06:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 589359d5fef34250e4a78545c23fd1f5 SHA-1: 354555d8a1148d9cc9430852027de65144a8ac6e SHA-256: 69bb3737af5c7ae89b93a0b5b8ed57518196865e96efea1b0eda9202a5fd09e6
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host more PDF files. This behavior is indicative of a phishing or malware distribution campaign, where the initial PDF serves as a lure to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

Heuristics 5

  • 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
  • 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://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608224b5403e5---5264201896.pdf In PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/74ffd6def23b8dfdf2d537995c6878c0/tavesukiwonavatar.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ddeeb0b3d5681e4381ceee1e12bcbfa7/wobuz.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608903e87e2a0---xigenokijumivinipu.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee4ddbe5df---39420877396.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/54218787850.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/5itjvsblpp944ka7dggbqinhj2/sovesekukujowikagiz.pdfIn PDF document text
    • http://jarosi.hu/files/file/dipapejebeviboberoro.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/romusefefodi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3841526a63bccc86ba4bba9b77318845/jamowepanojexogodiwik.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/wixobajabose.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c8dcd6985e---saroladetadenasudef.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210722_025738.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/93008346581.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bb961960bfc---vobukunadajikowefak.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6a7820703f9a65d0c0985b50fb1df40c/23081080401.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/38218129938.pdfIn PDF document text
    • http://isgsrl.it/images/file/26107387357.pdfIn PDF document text
    • http://smn69.com/clients/866038/File/nuzupizaluguxome.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16102bb23afe63---midumobo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/v5vqorfamdo4h6l9k8tn97mu6c/kepexugaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=emoji+conversion+android+to+iphonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 10912 bytes
SHA-256: d1fd6249c1ba433cfd7ee28982ac3fcb8c4b554b3cccafc7fb56eb4ebd73e0d9

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