Malicious PDF — malware analysis report

Static analysis result for SHA-256 030b1ad4db23a1aa…

MALICIOUS

PDF

95.9 KB Created: 2021-09-03 21:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3b2901f7edfa9b7896b2181dfa4eaf6d SHA-1: f49e6e41db3535c69c68e2d97cd4d81644d115c8 SHA-256: 030b1ad4db23a1aabe96c3b8e524ef10e9d784c7dd58621e7844987f7f544822
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the link farm nature of the document is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://cructi.ru/uplcv?utm_term=list+of+homonyms+and+homophones+with+meanings+pdf PDF link annotation
    • https://partner-support.net/user_data/userfiles/files/66199915777.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/sigeliwusiwov.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c000c935ce5---gefufoz.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210625_9FAF4F46A365F00E.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103f3e225f2b---fujol.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/tikajurejurudotelo.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c54296c460b---topafox.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/24155489419.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5d50977134ff6de60ddc646c0e5b3f51/1596081071.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/39291871284.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160961582946b1---60853325141.pdfIn PDF document text
    • http://leton.pl/userfiles/file/61727977701.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092c9d7ee6c0---fegasupezisuvudixobife.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/lj3ilp61bulqevjv82dkeh7it4/72677157844.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/26092f691025f621cd366ba6494a4d28/sorabob.pdfIn PDF document text
    • https://allianztc.ro/files/file/medifewoneg.pdfIn PDF document text
    • http://badgerhillfarm.uk/38614998968.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/m2vals03q2gvb55knadjo1l1kl/badafiraguwu.pdfIn PDF document text
    • https://actor-conseil.com/files/file/65461616881.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3d6a4086263cb3b777f01980ee61355e/91708899837.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fokdjmr32c910u7cv89ft0rrg5/namokekemikil.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ef950cb61526be4631ad0893da6501d2/bovim.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/8hu4chgd402h67k1vc9lcih543/fidumuwekaxanopunote.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/46659029260.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/18858710811.pdfIn PDF document text
    • http://esistore.com/userfiles/file/dorobo.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2lvl1fu18fb0b3hntels2gkj5o/ruleduzutivamakokekomakag.pdfIn PDF document text
    • 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_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 18816 bytes
SHA-256: 14c84cab0d7b634002ff7a933e75b2cefc591368c29d6fe48af0e5edc20f0818
font_01_sfnt_off00013ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF8 10956 bytes
SHA-256: d831795f9e9fd682b54e2a947e2605fc9266e036dde807cb21226723bda7da69
font_02_sfnt_off0001591a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1591A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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