Malicious PDF — malware analysis report

Static analysis result for SHA-256 7192fd01b8dd174a…

MALICIOUS

PDF

67.7 KB Created: 2021-09-25 06:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ca75c58d71f36378575c1df006d2c289 SHA-1: 1e296afaf133464e658bec1e6d337bf0762ab4d3 SHA-256: 7192fd01b8dd174aad80b22a625e6f854c05548d69a5d35db4301320a6a72bdb
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, identified by the PDF_JAVASCRIPT heuristic, which is a common technique for executing malicious code within documents. This script likely redirects the user to a phishing site, as indicated by the numerous URLs extracted, many of which are associated with link farms and disposable hosting. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://archism.ru/uplcv?utm_term=which+app+is+required+to+open+apk+file PDF link annotation
    • http://insei.eu/userfiles/files/litiden.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/nokifix.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/88020193190.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/timonedewuma.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/9184891971.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/13470357516.pdfIn PDF document text
    • http://video-cycling.de/files/file/71658471061.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/fidoliwijirisevitarujus.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/10349257924.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/39483953892.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/fujas.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/ritulufitefedonarunadug.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/nolomifisapatis.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/75380741748.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/65855649494.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0d20d2b7c---gorowulujasujofovuba.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/21756088057.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_off0000aa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC251 11048 bytes
SHA-256: 65fc7b9ca80ddb5dda78cd3e81fae57ed481db68a5b13438845117b55796e7e6
font_02_sfnt_off0000dbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC9 14988 bytes
SHA-256: 5b892085039419c354d14858bb7bf9a63b044a50804117099c3eeb7638240f3b

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