Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e76c7d6f50485f…

MALICIOUS

PDF

75.4 KB Created: 2021-09-18 22:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f9d2d92f44f428f7f45f3fb84de6d9e7 SHA-1: c568052a560adce6f90d8d136a5a09303dced5c6 SHA-256: 44e76c7d6f50485faca4f73dae5ec675455e7743d89046af9b4191d4cdbd7c60
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, identified by the PDF_JAVASCRIPT heuristic, which is a common technique for initiating malicious actions. This script likely redirects the user to external URLs, as indicated by the numerous PDF_URI and EMBEDDED_URL findings. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics further confirm the malicious nature of the file, with ClamAV specifically identifying it as a phishing trojan. The presence of multiple unknown URLs suggests a link farm designed to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://movie2book.com/userfiles/file/40065302502.pdf In PDF document text
    • https://r4binsh4h9-att.com/contents/files/gerikanelurod.pdfIn PDF document text
    • http://hasyo.net/files/file/pegojalafoxudewipegafij.pdfIn PDF document text
    • https://tempegaring.com/contents/files/31987417608.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/bizunizadi.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/jinerujizon.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/daretedezugameni.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/52986668482.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc49fca80d---masevumupala.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/bipezinegejutejetiwomuto.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/40419262401.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/91583161636.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/11552898587.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/xufakaxumom.pdfIn PDF document text
    • http://runo34.ru/attachments/file/kimilosojufifinerodi.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/jupedeb.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/monola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=heropanti+full+movie+hd+1080p+watch+onlinePDF 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_off0000c0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DC 17572 bytes
SHA-256: 9bb8213ccd866dd4ad07f20b63669504c0a0001df770afc1febac65014532ca2
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 11340 bytes
SHA-256: 974d3f6b73a4b9616cd9a069b48d3047d76be21a9a0c411a0474b1514eced7be
font_02_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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