Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0fbf7c0b165a9c…

MALICIOUS

PDF

70.3 KB Created: 2021-07-02 22:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e4f5801f9984a1d3284abaef5c4a0267 SHA-1: cb7732c4c8e2ddf55e9a03fa9095e8ce3a48ef1c SHA-256: ff0fbf7c0b165a9cc8b6184ecf01b2a45cd159c0500827d999e69e8128dcb84d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5901

Heuristics 5

  • 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
  • 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://360mart.net/uploads/files/nowivuj.pdf In PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df4e7868e85---45200772218.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/letupofejutaxil.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077891bc96b1---gowikepisamaxugowodobodu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3c81d100e---52938116604.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/11154299486.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81f2c162b---66289859365.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/92793126942.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/welulirofomatabiwo.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/jabosewesogewip.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/10874876105.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae76426770---55007412531.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/0f3ef90f369aa84633ef04c799ae1af6/beviluwegaza.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ric7lsgleev6pjtg8a2b3rjsr4/majegi.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-14/20210614072529833375.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/e5956e8abb25162e14e3048532ddc414/34164851914.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/882328ccf542cc89ef652b44f21e61e9/22409243306.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/memumememotifumosup.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a714588fb2d---romowekomemu.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/mejekuluwunafuzalikufuna.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9e3cddbb0b701dc4382b2d55544bd7df/27381624167.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a486db47d58855db38a5c6c4338c9e74/medudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=types+of+measures+of+dispersion+in+statisticsPDF 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_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 10912 bytes
SHA-256: 2f2b071d0c3b4df428629a4d049258e5c0dc692b02494f4139bfa9372623de04

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