Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14d234d225ea3c2…

MALICIOUS

PDF

71.4 KB Created: 2021-09-28 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 36da1ac71a6eb2906181e2ef424631b7 SHA-1: da4056ecf7cecaeb54444d26ff6b519caf00f3ce SHA-256: c14d234d225ea3c240031df0c1811ab9dc6fb05724e71cf5cfd0dbe42cf5cc53
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The primary function appears to be directing users to a network of sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ecme.site/2015/vat/upload/files/15067097085.pdf In PDF document text
    • http://kamakuralosgatos.com/uploads/files/28950071777.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/82645235762.pdfIn PDF document text
    • https://angkagenap.com/contents/files/kiwuxolopabegasad.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/40242454004.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/72709788317.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/sunakafe.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/65636725521.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/55643799933.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/joxupa.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/selupeg.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/52921994230.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/59528632953.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161396f97705f2---jojifopagel.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614e13f6e05e5---rirav.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/89789229765.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/34973582024.pdfIn PDF document text
    • http://santeh.md/img/files/7837571370.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/nigerek.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/72029146736.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/97655493333.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630695515/files/76176162399.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210904213826.pdfIn PDF document text
    • https://cmoretv.com/userfiles/98265416223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+transfer+contacts+from+iphone+to+samsung+galaxy+s5PDF 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_off0000b34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34C 16076 bytes
SHA-256: 893cc7de73a6bcc0acd4765135ca92eac6de1d80707237bd9179776fdae6ad2c
font_01_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 11452 bytes
SHA-256: d4a8726fcf8482b0a408e6d4dba627a0d55a107a046dd5cf2330ab7b4f4f5f76
font_02_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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