Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b9452b86d854b0…

MALICIOUS

PDF

73.5 KB Created: 2021-09-20 16:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c4676cc4896a4f663c9ea7f3c56d3b64 SHA-1: f4dd7a8a6eb853152d7d33418a04620a0d728976 SHA-256: e0b9452b86d854b098025b55c718ad98660e8b6582f19c5773972452e8f23377
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded URLs point towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=gallery+magazine+pdf+free+download PDF link annotation
    • http://immobilieninvestors.net/userfiles/file/rafof.pdfIn PDF document text
    • http://cabini.it/userfiles/files/kuroveliretupuj.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16140e66b2de1e---dubizenolumo.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/winuv.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/pepowa.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/51932366905.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/dapisupuris.pdfIn PDF document text
    • https://12shio3.com/contents/files/tijosaxafim.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/mizesodufisemikowawa.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/22911152854.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/36924618313.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/wetawetinide.pdfIn PDF document text
    • https://lordoptika.hu/files/files/suremuvazafuvuxomatob.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/3378735896.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/kiteragefazudumifukuzima.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/65576214093.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/mipizolamoduw.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/76483978299.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/nosepuworono.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gusejapatulalelerak.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/mirafalibesaradi.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/jasojuwafubibowalo.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55525509404.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/kefimokibiluribariderelit.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_off0000bc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8A 16632 bytes
SHA-256: 63abe69c99a103297bbce64c1e5153d11b9ae4a4b5bab0693c2b34ce7888895c
font_01_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 10876 bytes
SHA-256: 97e80018632491ecd1254448a3776fa22eadf61089646f6767d95551e8f603f2
font_02_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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