Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2070e1a94f6daa6…

MALICIOUS

PDF

180.3 KB Created: 2021-06-13 10:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: be94c750868b6582058787bb5dc770f4 SHA-1: ac29e1f4646f8aae8ebe6cb9516602d957da155b SHA-256: f2070e1a94f6daa6f83597476f751497f2d6e415ef60fab7591aa50e8f1dfda0
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including a ML classifier flagging it as malicious, instructions to bypass security software, and lures for browser extension installation and password-protected archives. The embedded URLs and link farms suggest a phishing or malware distribution attempt. While no scripts were directly extracted, the overall pattern points to a social engineering attack designed to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=chak+de+india+full+movie+download+tamil+dubbed PDF link annotation
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/pvm3nhh6td1l2pvb3o658nhne7/97448058378.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/36996246a74317bffbb4345677f5681c/17379433967.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f7277c32c8738e56d6e18ca6e8524a11/21632914615.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d2ab11bd48546881a87d82854c2c4931/xokemizi.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/61809088586.pdfIn PDF document text
    • https://actor-conseil.com/files/file/55162857553.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607652dd9f52b---depepezanawikeguganuko.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/wonirono.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/43062856748.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095c7c57c697---valunuzowiw.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5038e86c663c0d31b64fdc59f6af0c56/batutiniga.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a9aa4199---zuvivuru.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ch3ngam3aslmgu4r8vhdk68qr/bobuzojesirewonoz.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/082ced4252a1b0109295c87283b617f2/81083172975.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e6232a099ca796fb8a57c34e68919e08/25911779183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002369f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2369F 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00024663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24663 8840 bytes
SHA-256: c0babc81c5ab4c9ffb44580a37c2da94321b971f6c81a02be18a526d77cb60cb
font_02_sfnt_off0002640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2640D 5132 bytes
SHA-256: f68802d066ab93088bc6bf37212a45726191730afd3bf6fed5f0e186fb2a0d76
font_03_sfnt_off00027571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27571 18316 bytes
SHA-256: df185ad30f7ba1d9482ac62992931de235aa660a5170095dd1a161149c287465
font_04_sfnt_off0002abab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABAB 16628 bytes
SHA-256: 7c87c6188cdd3ce31023093727c359adeff8cd17d4163cfb73190ff7c4a6c40a

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