Malicious PDF — malware analysis report

Static analysis result for SHA-256 0530797713ea1114…

MALICIOUS

PDF

85.4 KB Created: 2021-09-13 22:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4778aa4dbf215b6d0c4057c162349711 SHA-1: 7da8b25bb204e6b66e2e6bfc3294b91887827bf1 SHA-256: 0530797713ea11146ac0c0d64fd6d6989bd1aefafa6e55f1508d55eae2762eb2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic analysis indicates the PDF acts as a link farm, containing numerous external URIs pointing to other PDF files hosted on distinct domains. This suggests a campaign to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mhinflatable.com/upload/file/lubulavogujavunolekerusum.pdf In PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/50361688870.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/37419938733.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/semuxobosugeragi.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/94801692648.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/99250133179.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/53101364238.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/89640028114.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16139efef90da1---sagabeduxanatunuvewi.pdfIn PDF document text
    • http://totoumi.jp/upload/file/3927295246.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/11386010703.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/vivujenasugoxorenop.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/84282741952.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/72095095486.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/89628740021.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/16010016511.pdfIn PDF document text
    • http://belean.pl/userfiles/file/39819019787.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/72094669712.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/nipomiton.pdfIn PDF document text
    • http://boldogelet.hu/media/nelozejegomi.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/zokejugarej.pdfIn PDF document text
    • http://porpora.group/imagenes/imagenes_contenidos///xiwesomedodizez.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/togamip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=inshot+video+editor+for+windows+10PDF 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_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 17848 bytes
SHA-256: 4bbda9657f55b641aee7984524095438c46d9de1c8825d7856c557774e19fc9b
font_01_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB1 10520 bytes
SHA-256: 9e86c48f873d0ca0e5c938ce107b1ca242b3ffc53a1302e14ae4fa4a1113b4d7

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