Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a14f7c3178ba02…

MALICIOUS

PDF

85.9 KB Created: 2021-09-09 17:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 7c99bbb7ee1bfd173fa298725524363b SHA-1: 1bf75bab52860e15ddee6be937b3acfa19895245 SHA-256: 70a14f7c3178ba02efa6ec7800bd34c580fb7df63964c91d40a6eaf60f3111f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on various domains, suggesting a link farm designed to obscure the ultimate destination. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern as a link farm on disposable hosting, likely used to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bioident.pl/photos_fck/file/33633065027.pdf In PDF document text
    • http://fratellibeninca.com/images/file/bozuzifuj.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/sedizubakonufediz.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/jukok.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/85706497719.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/20730477640.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/vipasefolizitebuwite.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/xuvukodanojidudo.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/zotokikujonewijebukuja.pdfIn PDF document text
    • https://jagominum.com/contents/files/fidirikozuwedakebo.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/45123646617.pdfIn PDF document text
    • http://tdbm.vn/upload/files/99998140536.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/92791811738.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210909050831933282k4vexp.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65866859340.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rakukumexevubawad.pdfIn PDF document text
    • http://strandedtattoo.net/file/13648728442.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/jaxate.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/45520957834.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/latarelodas.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109022108509027.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/99053623195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=action+launcher+appPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9B 18228 bytes
SHA-256: 8bf4d7cf04d87aa8553805a4eb5f1f3e6a4eff3d24a260589986e01a43d2ce70
font_01_sfnt_off00011ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC7 10384 bytes
SHA-256: b8282928d4b740cdb5f74faea0d3f6c55966069d8896fa2744b1a6a719b5a141
font_02_sfnt_off00013237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13237 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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