Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e2f5b70727f4b3…

MALICIOUS

PDF

72.7 KB Created: 2021-06-27 00:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 28ae353d7785816acd04bf999ad8b345 SHA-1: 6e0842ccd2376159d770a4f8f2da6d1306acc203 SHA-256: 25e2f5b70727f4b308266cfea43a32c461ada387e36dd40d139289d819e9942c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farms points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7973

Heuristics 5

  • 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
  • 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://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/mapatikofubonozop.pdf In PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/19f923fa2c345dee0431bb5444cce904/vemegelos.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6666e47393c4deb341066c70356f3186/gonetodomosunowulu.pdfIn PDF document text
    • http://terminal.hr/userfiles/file/bilipaxanabasezil.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/65323324991ea8bb8d8981182849e551/dazepevimeneroxavinomak.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/4939344a213ff3a2dcd5a260178e6272/verusuxebiripume.pdfIn PDF document text
    • http://farmina.ru/uploads/files/79960293086.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd98d2c95---3757421339.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/14724085112.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rnvg8dj0onob656ncdckucu61t/19562528318.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/047f58d0eaca95946ee4b921e67322d3/37342942792.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/280130d59e3055b2bf57db289223338e/sonevupigi.pdfIn PDF document text
    • https://xistenze.com/files/files/9800003298.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/fa50f515a84a0335edebf0f6e3f30d73/mujexezavu.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///84945490416.pdfIn PDF document text
    • https://people11people.gr/uploads/File/19243207656.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7984f6e6c2---52204215654.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e3a013575---fuzizoxobafujuxuweveribug.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c1597e63011670b72e853206ae641834/xasevenelubemadogomedotim.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/43537321954.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/pavomere.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/24151834032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=who+first+invented+writingPDF 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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 10572 bytes
SHA-256: 1e9b791fc72d410766b605ff671d526bf1b7ba3cb6d4ede302dac0a1acee740c
font_01_sfnt_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 17756 bytes
SHA-256: 721d247bb091db78bb8992e81cc4718886f1ffbe86a465249e12dea3cd64f230