Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd60b9fa01698578…

MALICIOUS

PDF

84.3 KB Created: 2021-09-09 06:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3f629544f349b96ac5fd7c951a2e14b8 SHA-1: 9f1006fdd8754e5fad62db309ed3667b9de31acc SHA-256: dd60b9fa01698578e562039ac81c67bc3a748322294738b8c2f22f4558262242
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links, many pointing to unknown or potentially malicious domains, and is identified as a link farm designed to redirect users. The presence of embedded JavaScript, though not directly analyzed for specific actions, suggests a mechanism for further exploitation or redirection.

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 https://digireg.li/upload/madifulurokorifodejoxat.pdf In PDF document text
    • http://sun-dr.com/uploads/files/202109051553389313.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/65505431115.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/dewibojenetopokusi.pdfIn PDF document text
    • https://yifff.se/userfiles/file/butodabulufodowaro.pdfIn PDF document text
    • http://ore-processing.ru/d/files/6637700616.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/89943407162.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/siviwi.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/49779467932.pdfIn PDF document text
    • http://yesfabric.com/images/upload/File/33910199325.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/rovopapowaxego.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/66849169565.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/noribonofe.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/gedemefubonukofaputefamaw.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/wowawaxusowomiba.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/60694900958.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/xopiluvovugirejuzef.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/87160634417.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/9056456731.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210903021350456.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/sotopulosef.pdfIn PDF document text
    • https://akvaguru.hu/user/file/56779107926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=walt+disney+world+apps+for+androidPDF 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_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 10684 bytes
SHA-256: b9111d73a34357388874af059029306492a779b1083e84a416ed7de0f73c61ed
font_02_sfnt_off000114a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 17996 bytes
SHA-256: 074e7765f7f0630d0cf339b083bfbe61bff7cafab53939ecabc97043f8ea5323

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