Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b5f880d5be4e54…

MALICIOUS

PDF

95.9 KB Created: 2021-09-13 06:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: efb08d039a7dfc5e10b8616cdb6da514 SHA-1: 552b102a851715bbe9fa8df6cfb9c843fdf3d4fc SHA-256: 34b5f880d5be4e54ac990cc3cbd10b1701c10e8f82230f07688c4458cb616c99
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://iiiemjobs.com/FCK_Editor_Images/files/mexufalapu.pdf In PDF document text
    • https://lawina-radom.pl/files/file/xowesuf.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/lujofegefaninafa.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/25234711100.pdfIn PDF document text
    • http://teifsepahan.com/files/file/jowejoruwigidugojekapo.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/24019080921.pdfIn PDF document text
    • http://hangquangauto.com/files/14577307619.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/46296812856.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd3217a00a---xisilukusakenu.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/loloviretevukuzarizugulex.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/54543058697.pdfIn PDF document text
    • https://tpk-m.ru/files/file/76028937400.pdfIn PDF document text
    • https://seger.cz/userfiles/file/22150936843.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/nuvurivodedegubotokujiluz.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/guriwanegudepoxitatodiki.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/filesekawopererifu.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/80522546.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/44743126178.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/ratodogu.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/87013401722.pdfIn PDF document text
    • http://eko-uklid.com/files/file/97587625647.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/85159227101.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/34624785543.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/76014373481.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/nuxuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=niv+bible+1984+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_off00010d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D78 10428 bytes
SHA-256: a32647a62cdc9b53db7b3051fd2602d0f2eb0aa84d02d555cc5731a6b6adaade
font_01_sfnt_off00012510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12510 20740 bytes
SHA-256: 9faeb4f3afd8c2ab3452c31461957657989a8868ea8a5dfd40b9f746e9c78a97
font_02_sfnt_off00015a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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