Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dde7d301868c80…

MALICIOUS

PDF

82.5 KB Created: 2021-09-25 11:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d25c4d8597f2766823792d610a23114a SHA-1: 4224ea9ff2452882d75e17cc93862b2dfc4bb941 SHA-256: 73dde7d301868c80af67d98f45e666a29ea04630a82786112a8b3883447f6866
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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://techniq.ae/admin/uploadfiles/file/99010961778.pdf In PDF document text
    • https://contabil-fiscal.ro/mm/file/11173345020.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/54740992422.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/bijekexomukagifeda.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/14328253038.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/lepebovofaxopaxofisewawid.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/42226701275.pdfIn PDF document text
    • http://zenithmetals.com/files/xesodutakisubij.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/92794905177.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/17291883282.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/66236288383.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/9bj74lgj33djo0abkovfajch3a/23163110763.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/60490411171.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/99290344854.pdfIn PDF document text
    • http://dalaichau.com/files/fijixodenuxi.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/fuwofusewolukoroxi.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/80653594357.pdfIn PDF document text
    • http://wenxuezj.com/images/File/xixeratakoneropokevajaju.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42883038579.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/68101277397.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/sunazuli.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/72490504702.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/murusenobudiporatebesuka.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/86361091296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+cheat+codes+heartgoldPDF 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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 19888 bytes
SHA-256: 26adeb52d68c2ac49b3cd2dd6692c588359995c1db7ff6abf7be4e595512f346
font_01_sfnt_off00010c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 10816 bytes
SHA-256: 5e96d80de0177016b61efdf3a30d962c70d2e8628ecf05e33e4b24771db43fca
font_02_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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