Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ebb00f9daa076a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 02:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 716dfedda8f8438a68cf2753a2306737 SHA-1: 982877585f488421aa0705b701fcda4500aa895d SHA-256: d8ebb00f9daa076a8478c8ee2f6b3630649632ccd000a4a983bf4395e8428765
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=hentai+game+download+apk PDF link annotation
    • http://stefanourso.com/public/userfiles/file/ruvono.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/8892118401.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/28402593661.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/visadidukudawitekuxafun.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/gagufeso.pdfIn PDF document text
    • https://12shio4.com/contents/files/sozabiwu.pdfIn PDF document text
    • http://agilesolutions.in/uploads/9847921761.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/nepezeduvosewama.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/zefagunazewinarusanulef.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2lnh3gmin33c19o34drbukc2i4/kujejawexofana.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/58130140785.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/12314482782.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/pumogun.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/rexumewajiwimaja.pdfIn PDF document text
    • http://didopack.com/files/58772431367.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/85877828424.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/12ea67e6cba28b8fa1dc73840d87a1fe/wijegiluvonodenujajuz.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/78751010532.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/fuxovamiva.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/55738993016.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/18319675878.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/72642328249.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/83204507836.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/79165263304.pdfIn PDF document text
    • https://okazionche.com/files/rosijusi.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_off0000b27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27C 10636 bytes
SHA-256: 59099ae8bb376d88107a1609576259e525750c6a6530a876d0574dae90bf7f9c
font_01_sfnt_off0000ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 16156 bytes
SHA-256: b4b63f126fb722362b1119992fae6841c923772ec754e962965ec01501325aae
font_02_sfnt_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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