Malicious PDF — malware analysis report

Static analysis result for SHA-256 450487baedf8ce2e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 02:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2bbbb4b4b516654a9c6ef5d9094d8f55 SHA-1: 234d688243f04c1c74a35a1759a8ccafcc9d13ad SHA-256: 450487baedf8ce2ea5e886a25eecedb9891053260442714244c69f5229bebef3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/re8qeunrcaa81gm9fs51i9seus/81341350999.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf1818cef5---97689235181.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/225acd9745b155c2be63496d42791333/digovepixubaxojelegunu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e534272b2---49830727596.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e60999011cb81954e59b3f792f9664ce/jamuxubonekexero.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ed3542b9be360d1e7b24dcc6df581f8/vukirinutupamimaju.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/30fc707724c1901c9c2d8c1c03e9185e/piboxonit.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/97824964976.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/gojagopawotenebolosoguxiz.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/7a0df8a32ec5107836cf98bfa346d7d9/witumakajilasafepavosez.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/56716410679.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/u7qbl1vqbajj7stha73u101ot9/zugilijonatasitimesegojuj.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/b1eeb187a6c371e3a85f5ab7086eaa29/2744677035.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/vubajivafigarapebelil.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/91872545002.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/91725468977.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xenugipipeguzuj.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/iemucrqek2nh364cr04vuv4gc9/rumavulanug.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075da43a2bc3---33423097917.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/29226137695.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/vavunajefexawapikobifid.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/zexapotelaberul.pdfIn PDF document text
    • https://led7.ru/file/25654179841.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/46386451467.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/dff4ae4c3271355f1adad2e217ab4189/minedon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=chandrama+in+6th+housePDF 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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 10768 bytes
SHA-256: 795c8578945d70dee6c0bf23a0baa645acf6a6b90c16d20d52058afafaf2deed
font_01_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 18444 bytes
SHA-256: f7b28ecb0831f01aa1ced361da59584ce00446f2ebac8832ea77edf40ee898e8