Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ae7153a64bc0c0…

MALICIOUS

PDF

77.8 KB Created: 2021-09-15 21:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e55a4def88cbb8b5db6552e9430261d5 SHA-1: 87f4baa15f10c3a0dffed5c3a5a7b05f0fdb7de1 SHA-256: f7ae7153a64bc0c066daec2df2d988747152293cdcc48852846feb89284deb8c
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded JavaScript and numerous URLs pointing to compromised websites or disposable hosting, likely intended to redirect users to malicious content or download further payloads. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute malicious code upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://chcial.ru/uplcv?utm_term=app+to+download+series+and+movies PDF link annotation
    • http://auroraenergyproject.it/userfiles/files/kenubozenu.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/19763263864.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/midogikexevomilulixusu.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/40688877776.pdfIn PDF document text
    • https://magicdiscoradio.com/userfiles/file/28292983795.pdfIn PDF document text
    • https://clubon.top/uploads/files/gonej.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161338c5bde4d9---bavurekokafatal.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/16844755172.pdfIn PDF document text
    • http://roocenter.ru/upload/file/dowukizubugimefos.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/voxowupetafapux.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/56605527805.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/5a38f93444fb79f9cfd43e49f290ab91/7707217970.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/78158591875.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/suxewupiwuvituwo.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/73260911873.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/tupemuzugumibajomifuz.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/mifepesagisaw.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613378b294774---8355266531.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///sokananiw.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/zivoradozip.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/wobav.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/43999284386.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/gajowurevanekewoxot.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff940507db---gamivurudeju.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_off0000cccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 10684 bytes
SHA-256: 98c4e8a7834d4720552f2767dae7a2f8423b347e0a2e1132c8380a983ce6251e
font_01_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD71 16876 bytes
SHA-256: 8cf24f9cdf5d19ab0e938b1879926b5b062159a61a1675995caf344538c67bb0

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