Malicious PDF — malware analysis report

Static analysis result for SHA-256 684b2f17e6b8a7ae…

MALICIOUS

PDF

78.9 KB Created: 2021-07-10 04:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5a403c4e7dc7e0f835317ba45a244034 SHA-1: 93ae401d0eeb85b5d9dc9e9a296e4b4e272560cf SHA-256: 684b2f17e6b8a7ae36e5a4658fc89028fe7f1db9e2f658013a42174eb7c048f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains a large number of external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to lead users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5306

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 https://queure.ru/uplcv?utm_term=game+room+fallout+shelter PDF link annotation
    • https://larioenergy.net/uploads/file/jikozenukixivava.pdfIn PDF document text
    • https://areicon.com/images/file/tapafojuvub.pdfIn PDF document text
    • http://centrons.com/uploaded/file/89643477160cd8608786c5.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/pujomowubaxigejitop.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cc3d7b3bce1506883eb7f437901adf5d/26338474117.pdfIn PDF document text
    • http://abpaluso.com/upload/file/tedonenelure.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/21291891294.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d4e5b57e8---19642114697.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/86890414424.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/25d0037c5a3e8dfcac32e988b9142170/pivodoserugepor.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/81932933328.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/96103890952.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/18745bab04d044817679ac3c64ddf8c5/78834609103.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/paxuwo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a0aca7fc6---86604057084.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/22svfifno68n8nhufi49lvvp30/vanupatugobupusun.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846fc5cbb31---91075314511.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/bewoju.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb4cb534de---wivamusuvudekexujoton.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/314b71ac77c99e860c7a9b670b5fe4e2/2917563994.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/37f461fd71717fe11989119d792f05c2/34569645537.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/bad9ec0d4cabc31a6f7ce210e9c59faa/85115495292.pdfIn PDF document text
    • http://elm3rad.com/file/gobud.pdfIn PDF document text
    • http://envigest.cz/upload/file/zelitewogavojagudavulibe.pdfIn PDF document text
    • 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_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 17984 bytes
SHA-256: 12b7e76fff94344a953ee21ef0b79a6dbfc936001662db8c027daaf45ee5d532
font_01_sfnt_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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