Malicious PDF — malware analysis report

Static analysis result for SHA-256 29062e057ab9596c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-13 18:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 8c8b8ffc04284246dfe5e28a7b4cfa0e SHA-1: 5310e6107b7b5c31d942339996a458fd75c8ad9e SHA-256: 29062e057ab9596cefea84a79eecf95e885c84b563c952783a882254e4571363
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely leading to phishing sites or malware. The embedded URLs, despite some being marked benign, point towards a strategy of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://optimuselearningschool.com/learning/site/images/uploadfiles/suvavi.pdf In PDF document text
    • http://labonscafe.com/userfiles/61704241729.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/89063258957.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/94706996517.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/57378696833.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/wafanal.pdfIn PDF document text
    • http://annabarons.com/files/files/74355804817.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/vexikam.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/65120600909.pdfIn PDF document text
    • https://plasy.com/uploads/file/4150245711.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/sobubepugomiwataz.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/xosizuzagodulogujego.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/98487860973.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/bagafukezogodagegokor.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/tusuxonapizabodazedi.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/gopufotuzomifipi.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/82295600456.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/dinolupudizevepakobil.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/44137927291.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/19502920560.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/popevokawiwudov.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/fivej.pdfIn PDF document text
    • https://rajakedua.com/contents/files/levimepujedageli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=talking+cat+2PDF 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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 18136 bytes
SHA-256: d5092e579979f065efadff81a19d197bb8665f4478fe7f6f0bb6615b608a3645
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 10060 bytes
SHA-256: d29590cbf0347b063073cead299813041af6245f58fd76cae4ea3563df59ad7d

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