Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed785bff3e00889e…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 05:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7f46a176d85f22cb1d5e609a1530185c SHA-1: 4080d5ea450e6e273cd31ffb150a758812c59d27 SHA-256: ed785bff3e00889ed49c8e971f2b4b347dae8fe5957aaa95992425814ba164b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=important+days+pdf+in+english+download PDF link annotation
    • http://packamate.com/userfiles/golijadoporipivik.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0fjthk0buujlgc1lo9qgr772a7/gininofosob.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085065e11b04---kusibis.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/domirujobojizegojo.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/35961874123.pdfIn PDF document text
    • http://weingut-suppan.at/files/tibasavuf.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077632b002d9---14753749934.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a406192f0fb---38221002694.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/64528724476.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4f9b7dcbb185769712bb56b0999ee201/63157179852.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef4c37bab9---kazijojifurimoxuzufujuvu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9baa227de---20010095025.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b760974e031---76236492977.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609318095fb24---96304871684.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/vijepolemobinud.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/30646733428.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/volurilogotifewuwufasuj.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eccfd94b1fb---tebitefawesisifev.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/34236636698.pdfIn PDF document text
    • https://famecosmica.it/file/89053020003.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/nivagubozuxowovelanenu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63908dead2---wojubojexuvukabilumore.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/47405958243.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160de746238c83---maxuzegexili.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/laloduligikasejiro.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_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 17360 bytes
SHA-256: 306cd385fea13699b0d38ebac7d1b8dbd84e25d990e14b98f3bdb0e0c208f47f
font_01_sfnt_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 11096 bytes
SHA-256: ddb5fc26d134dfc9f75bd01fac7a7a0bcf9c5c26ee4f41babe1fa847fc0d4959

Open this report in the interactive analyzer, or submit your own file for analysis.