Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d6dd2bad67cdba…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 23:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5f16e0c7abc7fac71b2aaef6092684c SHA-1: 1409205b5cbb2f2e29e4f082f90672053dc6570b SHA-256: 04d6dd2bad67cdbaaaa0feb8e9c7e2ae96d3f6229940347bb3fbf94cbded7f60
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress installations, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point towards an attempt to exploit users via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bae18562df0---buruvuzugijarezedaw.pdf
    • https://wickedcheesy.com/images/file/76899332985.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/3554af4d238c24afce0208c57acbbd01/jutixotuzutovopejewuzigak.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/6bb715271caaf1f8c3003ca0e767f260/18188526819.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091641adbd79---gexuliwijem.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f15d63513c---xunurexidofobosigowuw.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/luql1hqa6d1hi9l3kl8g3vtph4/relatexesutuzile.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/j5l3cvr66l7n7279fsnfo3nqj4/48441253867.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1ec666ca---jemaritalupadowitiw.pdf
    • http://merlegdoktor.hu/tmp/38599405061.pdf
    • http://barcelonasixtytwo.com/userfiles/file/24442833398.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/tegokamagos.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f5e73959---gurawuwukatoregodekuguto.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/45748bfcc548bac21150f76abe0204c0/52310090905.pdf
    • http://duquenne-moteurs.fr/webroot/upload/files/90209602316.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4de8205b0---bupumanolipiz.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfbcfb1898---tubifurijat.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce11ebfdf8---55213070219.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c04df02b8---noviwodulaviradusi.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/97624651710.pdf
    • https://jxloanchien.com/style/postimage/file/19085667948.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce038276e8a---sulapimuwe.pdf
    • http://phantasos.org/userfiles/file/86611448447.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5dcae499b---vakekomozumofidowupe.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/n50b3sj59mpov78mn5enc8j8uo/26741053340.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c084c371b90---mosujipo.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/saniqlpd2r9jf4jadak9hskgj8/tegarazajaguxigesewasov.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=common+and+neuter+gender+list
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ef.bin
238ee8fe0ef8d566fc3794f708a4e66147823149e8b646b5752205db60fb5090		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 10724 bytes
font_01_sfnt_off00010954.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 16792 bytes
font_02_sfnt_off00012166.bin
14a43774d15a0490f2b16a3513509523d8752fea9a61a60dc977e66f75977dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 17240 bytes

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