Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf085982a05a68f4…

MALICIOUS

PDF

77.6 KB Created: 2021-09-08 02:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5d80def3af9e6458b6dda26bedd2952b SHA-1: 1f4fa22c36cb37f419b73b9afa793188ed96a255 SHA-256: bf085982a05a68f417b3ba8d6264f9b0ae7e7a888d918c4e612921ffbe02affb
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and does not provide direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6688

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://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/38550795826.pdf In PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/9fdaa6d2006ada2389605cc22128898f/vusivimezixiseg.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/42578947454.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf665ad9b---13970160479.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/79444673480.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607732bd768c8---31724752245.pdfIn PDF document text
    • http://landpas.pl/upload/file/99004250580.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092342b6a6d9---91571535597.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/94a9ff23cceac09ed64f8a982298c497/91948089067.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e60880be535---12907481648.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38008aa96---43197724605.pdfIn PDF document text
    • https://etadelloro.it/images/file/bomilebarozexusumogiwa.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/80542178542.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee89a9a931e---reguvonokedepaj.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/10b4a726e6ae836a1f67c9848ff9a4d9/zuwabuji.pdfIn PDF document text
    • http://ort168.com/upload//ckeditor/files/fiwafalababukuvixax.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/60938797344.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ca1efd4c26409213b13e1f66b4a9a289/gusirijikaxa.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/nezobe.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/fc7509e0d8185c58d7fba9c1ceda19ba/26865221268.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7e930cfb9a8fa1559489cc4fa43735f1/84803283694.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/43084225088.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/jonaraxojofedubokut.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c07b3f3a467404b8e20d6d96f2f09563/lukijokupupulamelerer.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210718202653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=piping+isometric+drawing+pdf+filePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 11048 bytes
SHA-256: 2fb09901db6da761d86f9ad37b272bcabcf9513c37e55c8462059c16292e8784