Malicious PDF — malware analysis report

Static analysis result for SHA-256 014f1deeb3021371…

MALICIOUS

PDF

69.9 KB Created: 2021-09-23 10:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 83f64dd776690b92f66abd9d9d7ee5ce SHA-1: f925c4a33d65857c963ff0d461650b9071da349d SHA-256: 014f1deeb302137151315ecfa1b7b90424fa936b4ffd4e89c88d08cd769fa41e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. The ClamAV detection confirms its malicious nature, identifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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.
  • 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 http://dekoblickfang.de/userfiles/file/96314220631.pdf In PDF document text
    • https://svltv.in/userfiles/files/pekurebufo.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/50929634296.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/84617631287.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/mujaveregi.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/fitema.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e5139d63f---xekegemanereli.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/lepovikab.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/vubakudaxetivomidimigu.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/25941965247.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/91834833103.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/3508643109.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/balomudemimekajurud.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/gisejukokunemo.pdfIn PDF document text
    • http://kdekdyjak.cz/data/96694558702.pdfIn PDF document text
    • http://chemicalengineers.ie/images/81191612110.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161342147bee5e---50228178998.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/gadesoxemowarezezof.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/94082054774.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/35453592122.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/bovemokewumaf.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021961557558516.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1631710325609554380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nook+apk+downloadPDF 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_off0000b3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EF 15832 bytes
SHA-256: 0fcd839471a6035ac6b2066926c9d1117c1e7a9e17ae94c5b312e73b5f5587fc
font_01_sfnt_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 9948 bytes
SHA-256: 83cb39eafe83b167b9603b389a19d505a38819e89e9031046538347846807de6

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