Malicious PDF — malware analysis report

Static analysis result for SHA-256 307ba09a82bd014f…

MALICIOUS

PDF

92.7 KB Created: 2021-07-26 04:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2d6500be1c528b11b92568b5c4d3ea85 SHA-1: 7b73086e0b8b740e7876d379abb8e8f8be670531 SHA-256: 307ba09a82bd014f7ebb728900c85bfcce52801a9aeeb82c78238cd6a2c51fe0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially untrusted hosting. These links likely serve to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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
  • 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.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac93034bf---bexikijapevotobabuxole.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f80e0e96be3---gubotupugufetevaxax.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/fbfb26ac91a29491497d84e29df28532/51187880044.pdfIn PDF document text
    • http://dgjst.com/upfile/file/45139708796.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/38179513890.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/37667598523.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/98138228673.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/gamofujitakuxaj.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/jupiduzedowekafovov.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/13683745848.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edf35f2032d---pimuf.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25ea8940e06832650512b82239ae1374/5267545640.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/22241878670.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/wixuzuvuw.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/bapelepixalofojojanikivek.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3ceabf18dfda241b72907b8f445916b0/35669370091.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160729fefe27b0---pavadakoretexav.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3aa47b47b88c159a02fc90729ebb9a4e/61061772289.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/tofar.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2107250204341898791j4kx56hcw43.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/94191198289.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/zadudaragarotoriluguf.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/t3g2s7rchqoo0vos3s8tpj068r/wiwaligipaxotor.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/73d8cc9464c5477d8ce29a2fcac541e3/kexomolixodavonof.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/61564324041.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+do+i+charge+my+mophie+powerstation+xlPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E6 11252 bytes
SHA-256: 76261362c0f804c239c125c8f8ff1ae30f4dfd2e2b9bc8215ec245fb60c7ac50
font_02_sfnt_off000133fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FA 18372 bytes
SHA-256: 45f2152d91bafc25d59c9507bdb3b779a43983b95a52683668dd0f1acb947143