Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1486e3b1f5b673…

MALICIOUS

PDF

89.5 KB Created: 2021-09-07 12:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d84781dedb91bc8eb022990d6083ea0 SHA-1: 00a63ca1d5c3487375a8897765db6185dba3c4bb SHA-256: 0d1486e3b1f5b673384ddee67f12f02b5c1b04cff81dbf58cb9743e092fdcd42
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and a link farm heuristic strongly supports a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://vivaibonomo.it/userfiles/files/furebedikeniboxuluta.pdf In PDF document text
    • http://murphysbeads.com/clients/54316/File/59251616553.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210714114145_846681777.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c3844059505---burigijado.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba688e8c4a---rejawa.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/jixuzusedirosupuxolenu.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/nitelarar.pdfIn PDF document text
    • http://mosjob.ru/images/file/53453051530.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ec20kclruqme5ut3b1qs7i6tnk/zevadesofikasonaru.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/573raarb2f83akoj6aruf09jf7/mutijilowuto.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/sebiwowubupumizoxifeja.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/2251181345.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/93818372793.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/vivobasegeza.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cc5eb1f7f---22447409463.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/nf57oo286513itclel9kq3uhgk/47179233951.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/95905732228.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/l3js7q53fias825qhfhheedvp6/nusov.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/b4f43625f03965894a3f91e2ced207e8/molobinofipoduzudaj.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/67363002467.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/zipegaligot.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/23953289278.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/2154940196.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/a1m21ddsvd31bugfbfogkn2gjs/fozawemuvurumoxor.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a34e73f1156---navokuzatowut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=internet+marketing+course+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB7 18048 bytes
SHA-256: e57b7607433cf0d7948cf5d050cc9ccba80e908effb8ff5706abbff4891adffa
font_02_sfnt_off00013f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F18 11060 bytes
SHA-256: 2c079ddf4b5f4e73b604a7c3fa8a7c922332069d9d0fa5ee04b0e5444f9367af

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