Malicious PDF — malware analysis report

Static analysis result for SHA-256 f450b09eb216d5ed…

MALICIOUS

PDF

80.7 KB Created: 2021-09-08 21:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 64b4dcdd1d09a889fadda557be672b56 SHA-1: f8a6650526964f23fe5b6f3f8cdf3e702701fbc2 SHA-256: f450b09eb216d5edab0ad11f4eef1104b9b42def34394df38a1791fcf26e74d8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, pointing to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lure users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.fashiongale.ro/userfiles/files/86978459841.pdf In PDF document text
    • https://et-auditing.com/userfiles/files/wanap.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/dosajoxekusuvapusuvo.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/pisulozetiwerizux.pdfIn PDF document text
    • http://hibertek.com/image/files/20210904_081445.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/runanogewowuwevizoz.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/katuzul.pdfIn PDF document text
    • http://takipbizde.com/calisma2/files/uploads/23977023985.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/73763990912.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/tizidu.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/83376226641.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e18185b29---2889394581.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138ad35b69d8---27504665910.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161338af24bf42---nozobirutasirog.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/81839305260.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f868707c32---wibamusagedazubuzudulin.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/kiwaxowaloxidonol.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/22144097892.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ff1d8b8b80ca242b6a25eaef5996e13e/32896538318.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/14915121231.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/92361423707.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/37389988241.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210905130040_vbiasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=multimedia+systems+pdfPDF 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_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 16508 bytes
SHA-256: 74785106aa803721aeae7088691dbe8d19e5110218bf64a59a4e23da75a05d1f
font_02_sfnt_off00011d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D05 10540 bytes
SHA-256: a5c644bc971841a0f4077b923f2c124e1d5b65e63620d69d63c0361683f0f1ba

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