Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f89816479cff43…

MALICIOUS

PDF

74.8 KB Created: 2021-07-03 23:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d1b640d274b36e3a5f511c7b37525253 SHA-1: b2b75e39b9ed812571d1e115373b7ac2fe94d158 SHA-256: 80f89816479cff43f2f3946b7c968d0850e801d9e0e84f348107ca41127690fa
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting domains. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7933

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://zigzagontwerp.nl/sites/default/files/file/29676777427.pdf In PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/576b17dde1941c0de732e348bb521a53/22675809026.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a5679439---94228023372.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/gasepiget.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/1ubudm98kasicgsa3d0aapipbi/rofajegu.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/bovaxudegekozuwedesaliwaz.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2a923b50ae2c730d895b344505473bc0/vapujofujokesebilid.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/805571649.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/nevetabufuna.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92331bc35---58402483232.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/nuximowefazivesebidorow.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/dbd2b1ce481666c4caba00edc71c561a/witawapu.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/60305297777.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098921308298---jasubesixunemoruz.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/57181874661.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0bdd82badf03133fe5a92fc7114926f9/25852577076.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/mixali.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839ea540f5---jogala.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/20b25d75b9bfdb38398744b359dde248/gejirekejelezudebafadusa.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/28510307954.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/56937603003.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/vasuxitifogaki.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/46798329356.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=difference+between+first+order+and+second+order+differential+equationsPDF 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_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 16992 bytes
SHA-256: 0f4d8979fd16f1da1a58754b01df84a7134ac8c9b6bf0298094708a7dac6e13d