Malicious PDF — malware analysis report

Static analysis result for SHA-256 737a624ed17578ee…

MALICIOUS

PDF

96.8 KB Created: 2021-09-09 00:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c0765e22b76ffa52b0bc823851a3df6a SHA-1: eb015527a232e1806149344c3ea5c1cc7b8996f0 SHA-256: 737a624ed17578ee600b53804e5fb4bb37ed393e3a6f7e0eeb8ec08cebf615dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm tactic, common in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://mrtowing.ca/Lawyers/userfiles/file/wowisalaroligidenim.pdf In PDF document text
    • http://lorichphoto.com/pictures/file/rimukotovaser.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/29751266430.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/76853000575.pdfIn PDF document text
    • http://yoron.net/up/files/29797479520.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/zaxubedejimofi.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/41351507979.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/86044595129.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/64833187295.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130e635e211a---94604612000.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613853d54025c---10621562845.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109041244024520.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/26475133751.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/pufafawexab.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/40605967993.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/63783553067.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/61533631993.pdfIn PDF document text
    • http://aweibel.com/Photo/file/75914407784.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/tukarawazakulitusutoxozev.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/jusoxenutilemaritoruzan.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/50541212042.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/noduzuvovarokeposu.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/59871526075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mission+impossible+ghost+protocol+123moviesPDF 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_off000108cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CC 22128 bytes
SHA-256: b84881caa3a147ec187eb1c526557997a667fb9a26ab801d10e6da659a30cbc7
font_01_sfnt_off00014360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B77 11200 bytes
SHA-256: 14a241606b378f1447c20ddce5e0ad75e3a7a3e14b1f140ad621e7e070373266

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