Malicious PDF — malware analysis report

Static analysis result for SHA-256 10788588356bac70…

MALICIOUS

PDF

84.4 KB Created: 2021-09-03 17:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b37fcc8396f520b1c4284d2fa3eebc10 SHA-1: 1b6b468dbf6194f4683aa89fe7e9fd4b544a8d27 SHA-256: 10788588356bac7084a1ca7e7a8e2856b2f0067dac93ad54f31a43410e4c503f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, directing users to multiple compromised CMS upload directories and disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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 http://shangrilatheshow.com/ckfinder/userfiles/files/74498736353.pdf In PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/3c523a8b91252a040046695fe3e1d9bc/50765467861.pdfIn PDF document text
    • https://esz.jp/img/editor/files/tiboxojudutog.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f622db2df2---boworejokulilidoleru.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6eda389a819d0e0c70eee31aa3d5124d/negafiw.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b9dc3c56fdd79cbb7d767e87c8611e8c/ruvukori.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///woxaredosatuvugetewawagat.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/35e9b15259a843e16236e320f41ad9ce/32209324567.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/pinaxevinabetojitiniwipo.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16095cdcb1df85---votupir.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/7573732431.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/12342417121.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/wunasi.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/63063404876.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/vekotej.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/juvaboda.pdfIn PDF document text
    • https://efnnma.org/files/file/61766573126.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/928a407e5f6c55cf64f9ddfd371d1e7c/kubugujipavifit.pdfIn PDF document text
    • https://ienter.bg/files/302916852.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/xolubuvutokogomenu.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/25823529910.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/94007293943.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3563fa6a7dba5925d9c57264bfbd0f9b/dotapolanok.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/e9f425f3a2253532d43dedad9cc9c358/nutazoj.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cf8d9431e---39983058302.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=exemple+devis+graphiste+auto+entrepreneur+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 11196 bytes
SHA-256: 5b69a70c2af15d32b5f0516af4d9fb4a0e2cc5aa0822973eea8c521d1635218e
font_02_sfnt_off00011426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11426 18020 bytes
SHA-256: 8548fbee1381ba6c8b6d25e66d46bd5fc41710d284556b57bbefbc1368193988

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