Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0954a75985f4a6…

MALICIOUS

PDF

85.1 KB Created: 2021-10-24 01:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6e0963c81c54ba862b05ebb080914233 SHA-1: 12c2764281b8d582d1110e5dc55108ba9f30e13c SHA-256: ae0954a75985f4a6eefe8253814d1016c71b7db4051c8db934d970865d038e5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites, suggesting it acts as a lure to redirect users to phishing or malware hosting sites. The PDF structure and embedded links are consistent with techniques used to distribute malicious content.

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://xhzhengli.com/upload/61604090114.pdf In PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/d2iuv5tf3sdg14kh7l1mdkrff3/96551966737.pdfIn PDF document text
    • http://gns3.swiz.eu/files/editor/sewulanepuduroferomixib.pdfIn PDF document text
    • http://24cvety.ru/upload/files/34227089164.pdfIn PDF document text
    • http://teraval.cz/res/file/migunuzoferaputoruribek.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/32069202272.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/nedevuwasok.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6aefec262f99ad1e9a263ff041b97745/11306318610.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/47552014093.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e2f7ea8fc6---libaxusuponudonetijikuje.pdfIn PDF document text
    • http://cutskytools.com/d/files/69414960588.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210920202857.pdfIn PDF document text
    • http://erpos.sk/data/files/popafesunaxepirozuwir.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1616962a7a3564---fitelijefavojedajifinulaz.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/povalejejaneki.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/97444014352.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/32197274015.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7345567c02b167d460718446c48cc5c7/vuveperajekulukosamojexex.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/18783843746168b7a897be1.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/8e60f5429c7d462d1caacc8f74c0d905/32349297275.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/13042222592.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/duvomederi.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tadobobujovifuvudiput.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/7xhmvLXWVJc/uplcv?utm_term=logos+level+one+answersPDF 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_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 10200 bytes
SHA-256: 87580b364c02b7c8269043ac6f2b19258878ab1922825a7145da17bc56a31a49
font_01_sfnt_off0000ff91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 18212 bytes
SHA-256: 695a6846f176fb521e687206864ea14e254cd8ff1d71184dda014f597c9b2afd

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