Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f0150f73eaf29a…

MALICIOUS

PDF

88.6 KB Created: 2021-08-18 07:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 6fb1e5bbe9b79a30f9aca88b378b7960 SHA-1: 5fe23d196863c0fd9d6a49c3142ae720a708fa4d SHA-256: b0f0150f73eaf29aebe2feba5e73afff76c7ae903383ec0d1f2e9ec0b2d9f51c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious. 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 0.4575

Heuristics 4

  • 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://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c10112fb---18218190888.pdf In PDF document text
    • http://grandchainfamilyfoundation.com/clients/85333/File/selakabutelubimiv.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1f2f777186ccc237ec0c005ceaafa7a3/10409155473.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-9/20210709205626278218.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/54881409341.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a934245ce31---gusosir.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ba606566666bc0cf69c8f64ebce8c3e/78578519873.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/jepowojazipegevaloneg.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/jasafegavevadaxo.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/bejemozo.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/jhfiuaad0j85u6vvlhvb6sjn1m/kinasale.pdfIn PDF document text
    • https://arerp.kr/data/file///43455853944.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zajabifubopofotujawiri.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5429b575a9371e0ac8ff4217e40822af/68531179566.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe2a76ba6e---xixepa.pdfIn PDF document text
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/47742944456.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7cc6410e36ccafc00df496a7a64efea0/litefejejabewexaman.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/38bf95149cbbd38179b673364d3661be/kazepevemitipevo.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/gilavi.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/fakuvonanilemom.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/1697723553.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/pafiwinawebolowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=tabla+de+nivel+de+confianza+valor+zPDF 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_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 10432 bytes
SHA-256: 7b54a4b6be3c169fa617f7cebe6ae5085a2202107fabd71e0fb327ee479cd8ee
font_01_sfnt_off00012026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 18604 bytes
SHA-256: a31fd4ac27e832d50cd55a685a2d00ee7bfecada2d74e1b4b9a93d3165dc0b15

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