Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8b38739c705402…

MALICIOUS

PDF

77.8 KB Created: 2021-09-10 20:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f4eb5ff3013877f81c010ec5f62351dc SHA-1: ea233c2ddcfd424500da919e0a66a963165a9f7f SHA-256: df8b38739c705402047fb76ec90813ac1a6aae9d74eaa5fccfdfa383902719ac
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://thingstodobahrain.net/ckfinder/userfiles/files/60179721818.pdf In PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1630879769.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210903185352.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/88503444533.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/xarejodu.pdfIn PDF document text
    • https://bawauang.com/contents/files/7453551974.pdfIn PDF document text
    • http://medica-brno.com/files/29857598938.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/rosakepeliserujajizexumes.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/dukezobuz.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/1148120775.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/44519270745.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/31515299460.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/guligizazotofarakepegex.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/kisiwosoterinufematokaken.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/25957063165.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/67084334087.pdfIn PDF document text
    • http://risme.vn/files/wofasotavufo.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/ripiz.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/65471487383.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/79762961108.pdfIn PDF document text
    • http://citra.cl/userfiles/file/litumuv.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16138c64fa8b09---mafemorema.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/mejokiwilivovuwimi.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/gugipibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=50+shades+of+freed+online+moviePDF 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_off0000cfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 16064 bytes
SHA-256: cf18ae06c4486ea9960616e16b44e35ee6f393ed66994ff937c4b84144c2dcb4
font_01_sfnt_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 10744 bytes
SHA-256: ee532aacb1211bdf841aeb2d88be21672131a9b1aaaf853d1a60a0a8322751d8
font_02_sfnt_off000111ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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