Malicious PDF — malware analysis report

Static analysis result for SHA-256 243dc1e04c23921c…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 13:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4ff4ea6614bb44c7f6404a260addac58 SHA-1: 9490d7f3ff2152741e5c2cf674bdfca156dfbfca SHA-256: 243dc1e04c23921cf2f2f6d3bc0c505d0f64664794c4ce113f7d37f757b1412d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead the user to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://vasantviharproperties.com/userfiles/file/44578182305.pdf In PDF document text
    • http://nemdanangpho.com/uploads/2021-09-05/images/files/26612099239.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/68409783995.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/83516233737.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/51146421572.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613639a359195---5937893969.pdfIn macro / runtime command snippet
    • http://www.cemeba.com/uploads/ckfinder/files/43328763421.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/38263734957.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/81854718900.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/77369909107.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/83214699084.pdfIn PDF document text
    • https://cet.sk/res/file/sumegidizajanunubuzu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/97c6039da0ee15d925aa651da5a31f74/29811286624.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c27e5378efd586ac165926fe7aa09f04/xetexopilupuzi.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/lodakiwonexas.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/45654998604.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/doragosimopiviket.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325707b6cf3---nusowabanav.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/18351522719.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/gufekerexupawotigize.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/00e8119c81e3b9a5a046a1abd7210a69/95037703940.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447cc2e6d7f---tobonuwukadezeraboxuko.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/jodabisumizi.pdfIn PDF document text
    • https://minjar.mebel18In macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+set+up+new+android+phone+from+old+android+phonePDF link annotation
    • 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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 17968 bytes
SHA-256: f9cdad659ce9dde57c132a5c3406cf8cc87bab8f22db7536763c79f1a7e4668e
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 10940 bytes
SHA-256: 0b3cbcba5ef409557ae0201fb0886808c9b3caf46226de177bf0995a01e53dc1

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