Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1129cee59802dea…

MALICIOUS

PDF

89.7 KB Created: 2021-07-29 10:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9fa547146fc38998614738b84bd9decc SHA-1: 257a73813d821d8651f5d28cef2a450c7178882a SHA-256: f1129cee59802deac6f39d9bd01242f5c9b1ee6b27549a1ed4269a5a67b6d97c
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a secondary malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=calendario+ambiental+2020+colombia+pdf PDF link annotation
    • http://files.ibiza-ferien.de/file/70468925327.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/2bce5b2f7e47ffbf039c32a1cb09efd1/luwupelokuvifarowomoxeda.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/92709mi0r9t7fffjj15li4nn6u/geselifukor.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/27453887268.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508132826_2096454707.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/24f496719e7ce66e6d773518f60f93d8/wofazoxunabonoli.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/jakakuzonafukirifaf.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/21381805595.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/23331621729.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607df589239c8---vikajula.pdfIn PDF document text
    • http://alkanboya.com/files/file///xotekijegikujinikolesusal.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/25414901889.pdfIn PDF document text
    • http://aps-mes.com/files/file/budewedezelilanasepineme.pdfIn PDF document text
    • http://skomi.ru/img/files/file/52014673408.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ac15afd119cb1f378b94270ed4ecd720/buladofomogu.pdfIn PDF document text
    • http://silver1979.com/upload/file/wajagazosariwuza.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608933a400101---dekurokuta.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e3691ecadf2---jakokoke.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba8d902c2---78803390680.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/begenutewos.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/215f12ef5050a5523c9a1ce0c6556b8b/14800738517.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a138369514---tulesamubu.pdfIn PDF document text
    • http://fygl.net/uploads/file/251305051044.pdfIn PDF document text
    • http://remobudostol.pl/pliki/82060331637.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f327fd84e5182d601d328a0502829bb6/24900868719.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_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 11024 bytes
SHA-256: bdc41e4ac181838cba32d68e7c0bd8fac3db68c0107f2238828c2d90f0ead2b3
font_01_sfnt_off00011179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001298b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 18032 bytes
SHA-256: ae5340cfd241f73377ad372eafa75c924cdd68d3c09cd845166afdf45950096d

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