Malicious PDF — malware analysis report

Static analysis result for SHA-256 267483ab5e2b3c34…

MALICIOUS

PDF

83.6 KB Created: 2021-09-23 15:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ab32a4f18a98548a8e0901934992ee4b SHA-1: ca376af2b219c99ded7d69b18428509f594b9e5a SHA-256: 267483ab5e2b3c346fb0eafc4f099935af8e7ea01ff601417ac69161b59de617
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using many distinct, low-reputation domains to host linked PDFs, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of external links implies an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=how+to+get+free+gems+in+monster+legends+2020 PDF link annotation
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/jinetupunego.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/96777671412.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/18895406160.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/86143918162.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/85170926761.pdfIn PDF document text
    • http://17njl.com/userfiles/files/64069891592.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/77727627546.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/jijoz.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/82441850910.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11686422630.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/vunug.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/30831666240.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/xefipuvu.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210901142958731.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/39467880324.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jutudef.pdfIn PDF document text
    • http://ailizia.com/userfiles/82499706427.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/xilexures.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/salepanexadanutubawetazas.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/kejew.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/75598521396.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/tapavixurawu.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/14733610919.pdfIn PDF document text
    • 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_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 10856 bytes
SHA-256: 7bce64acdaf7ec2bcfccb1b70f091f0f7c4e886249d96573268b91c2cf352f26
font_01_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 18660 bytes
SHA-256: 614874f6ba80ca243f6978e23d34497caf762d7ed0215bafc5f024974bd94358

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