Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7cb757bf8762b5…

MALICIOUS

PDF

70.6 KB Created: 2021-09-24 20:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f542cda03d9551ed7e6a420036c461d7 SHA-1: 6d05b8e13df946d482db966aba0426b7e20505af SHA-256: fb7cb757bf8762b524605eefe424dca739bdf4bd555510c598ead346a247e591
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the true malicious destination through a network of redirecting links.

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 https://lensmam.com/userfiles/file/60749477082.pdf In PDF document text
    • http://camelliafb.com/uploads/files/202109131111202292.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210924_081125_2134.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/jamewobazibosalekozub.pdfIn PDF document text
    • http://domuran.pl/files/file/39948161409.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/20931013957.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136792e04cd8---sulegaxuwufopurimed.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/69084410635.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/72817601483.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/11565254327.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/fokizugonatex.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/62028150649.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/38882100003.pdfIn PDF document text
    • http://telecycling.org/files/file/72007571043.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/gukozulozo.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/rivukot.pdfIn PDF document text
    • http://beijingteye.com/upload/files/35677179960.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/velawuponusijeta.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/gesemekojowezodajop.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/35913211330.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109171046535982.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/gejenomewefa.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/46852052870.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/56991323017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kelebihan+samsung+galaxy+grand+primePDF 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_off0000b218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB218 11068 bytes
SHA-256: 15f861ff9addcb6f6e0c015a663091fa188cd69ac604489523cb959ae9cec5eb
font_01_sfnt_off0000cb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB30 16152 bytes
SHA-256: bbda563093a3c29d41d2f4b0c363e435daa286fb4aa499fac84c51016f100ac2
font_02_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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