Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d30ac293ba695d1…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 22:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 00761c1fb935a5d501c478f926fd40c9 SHA-1: 693597f9d9fc87f9335c031de18a01a2321c6e8b SHA-256: 9d30ac293ba695d18d26709f4f9e03d4ba266235f7a1dbd5800a2b07bfe0d508
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, identifying the PDF as a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://philabc.ru/uplcv?utm_term=hardball+chris+matthews+book+pdf PDF link annotation
    • http://pilot-market.ru/new/files/file/jiletubudotukerow.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/583256932.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/wanumunefewezorebezes.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/8472235643.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/bamerasotojomef.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/togusimemefavodinezu.pdfIn PDF document text
    • https://krajkarka.cz/userfiles/file/38840240229.pdfIn PDF document text
    • http://lblussana.it/images/file/lavetubibopebafaforet.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/wawepo.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/fawudatoxojexenubogozugaz.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/77344906072.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/xegirosobipabumimepezub.pdfIn PDF document text
    • https://vendax.ro/files/file/jazexilotalesagugo.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/87281167674.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/13669852724.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/84932876474.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/lezirikivexinejedijevizi.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210903_061B91998709DA45.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/49573237367.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/bulizarutafukefalikavo.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/rinarusimoda.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/nubusumegagodar.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/tunexadadogimilisewo.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/34132679545.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/16208129955.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/migugusimezisulabegunu.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_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 11092 bytes
SHA-256: 248ee533c4e63725f848d6b9649c7d092e133d4c2821560f0566b2ac8eb36a2e
font_02_sfnt_off00010da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA3 17944 bytes
SHA-256: 977063af5e647f8e61135ffe52b790aae50b43e3934d25989c4c65a8998f15e1

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