Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad458467c2f94a2…

MALICIOUS

PDF

83.8 KB Created: 2021-06-13 13:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c037eea53729a329ef34786682b490a6 SHA-1: a2ff1e9a8892a78a903d2e7e1b207d521ec25291 SHA-256: 7ad458467c2f94a24393c1c4c7e73478980e26b9e6e5927e28007bb66acf722e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/uplcv?utm_term=n+cash+apk
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/38550e9f3a504dcc9b944e0662b1db31/nutogaz.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/6b18bfacb3c1c1b76935aa512f2fb234/likowajulilerilafesasona.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/88tp2jrg3rkt94fga5ri6i9vb3/11899763384.pdf
    • http://libron.pl/fckupload/assets/file/zamogibaxalowumurivegoxar.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf1d0e712e---16039294708.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099c82571724---72761228129.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747d472f0da---kigijalisiran.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/g1qe79qepikv4ehvne9qh4vto3/51111557763.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/416e810455168a1506f3986771bcfac4/poxopavafogajadewora.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfbpmn5ja70bpqdnpph5udhc19/3710584216.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/20e1be1af63ad7aa39e283d19e16cf60/xumugupiza.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/tr2btskfume1m1hnf4t23613e1/fuzesiwijoxumitejalu.pdf
    • http://bundoreh.com/fckeditor/files/file/fesilakuzisimenoxez.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/cf745fd27f1a47a8fba193fe1a7e6f2b/47988481947.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/3hskg3f2kjo8pt5vataimfhec0/pivijajemawamugupiwu.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/97909836721.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/5fe581dc7b4615d08cd97a5838ba4fdd/12651911236.pdf
    • http://euredit-editions.com/userfiles/file/22706015534.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011e86.bin
0539abbd4b73f3b783ff2013915508222c2ee129cf4e4f137c763c0043c19117
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11E86 20324 bytes
font_00_sfnt_off0000e54b.bin
50ed40c1e18feb2ff395681ab4eabe40b394e1f6f0ad2819f0040ab6214bf6ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 4928 bytes
font_01_sfnt_off0000f617.bin
16e532361eaa5ae7bf1c85102472fce54aa9dd9e6496a4f529bb04ce389a66aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 11820 bytes