Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f48eb25b4a4fa14…

MALICIOUS

PDF

87.5 KB Created: 2021-07-07 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ea596be693bd5c00eb5b0011301dd73b SHA-1: dc7d838c03805d1abcdcf6c78c7b93960a6218c6 SHA-256: 7f48eb25b4a4fa14a4e75c9770c46c4f60e7e4ff1333d7262f4ca8090839b8e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=pierre+gasly+first+win PDF link annotation
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/b5fb01e42ac912b65a5507881624e433/91321183234.pdfIn PDF document text
    • https://arerp.kr/data/file///27043320416.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962187b0f80---315200080.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/rakewekuzawaxe.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a41e0a2b4d630f7f32d9ce65a6841f7/lakatavozet.pdfIn PDF document text
    • http://smn69.com/clients/866038/File/juwuzapimamuzozejof.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/kevuni.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae51f586f1---soboditigakivorim.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1febcd9de---77406991242.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/xatijolerasitefubewez.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/36858195312.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c0ec5b4bd---43988736681.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20379669248.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/601769505.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021043004205873499.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c934014fc6---19401361371.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/q0vs0t5ec9vnrfhe2en4futbev/pazonewatozanilajenatibe.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c548c9cb353---80236405356.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66c9219a65---26772464657.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56ea6b4b8---vedanotipufodo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094813681066---84873923071.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/gapalizewasutovodibi.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/44071e5235507be0c387665ae5f2d971/bosasomada.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18eda7691c---rosuribowobaz.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/1892708442.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/zatugovati.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/45945942533.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_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 10468 bytes
SHA-256: 57e43a2cf2f0cf1f8b0a066de84e33cd4b5780edfcf9bb84822452ce422a993c
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 16848 bytes
SHA-256: c58c6f4de01ae3298c02cae1ec2b9e49e58ed9b2aeeb639381a23dafaaea6fc9
font_02_sfnt_off0001387f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1