Malicious PDF — malware analysis report

Static analysis result for SHA-256 db08fb37b4670b98…

MALICIOUS

PDF

83.2 KB Created: 2021-07-23 05:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 23dbc9cd4b6c8ccca03fd50b5a665f0d SHA-1: bec827fa85279a872137b19dff5e652c1620c061 SHA-256: db08fb37b4670b98548df0380f97db9aed0c5fe7bf39d0b6f1cdd5c43cb04ec9
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. These URLs are designed to lure users into clicking them, likely leading to further malicious content or phishing attempts. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7161

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 https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/n1q1jp5041t439v0u5krmguak1/62303532502.pdf In PDF document text
    • http://idealhca.com/admin/images/file/4801329933.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606e556e5a4d5---wudebolofawixabinukug.pdfIn PDF document text
    • https://argumentua.com/i/file/1901865836.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/1b5s3ifq9e8j5l3favt9dnhvrf/11200492574.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/70975071693.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/xotut.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/30126400848.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210626130544_1j4e4x.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/99344968248.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0a3a8e7a13cf0a2d33a499cc60b70d63/sulatebadaken.pdfIn PDF document text
    • http://come2menorca.com/images/file/50687297339.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/kojasunuwe.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/3395151125.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/11632694326.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3af3bc3f7b---javagerosogeberatomedu.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a11eb22adc8b9da7ca6dbb03cb8738d2/rikuzakesoninum.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/gb95piaf2kri7jakqgo87qpui2/joberebonoguwumesafem.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/41456621070.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/eba0d2ca65f7bf059e887ba6745e1e9e/ranujinipozogalefubo.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/nareganuturofazesijane.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/30097449260.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zikakadujilosurojujip.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/deviwepegawolosob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=every+character+in+danganronpa+2PDF link annotation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13817 3040 bytes
SHA-256: 457ef634fb04f24db46a1decb978c59bb7246bbf0982d915bc7d3ae01f28b261

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