Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6267cc4c95fa23…

MALICIOUS

PDF

75.5 KB Created: 2021-09-25 15:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aad8aa3dbad63f035344827d419d504c SHA-1: 6f3aebdff9016fd477c85f432d580209856a19d6 SHA-256: df6267cc4c95fa235b509118ff48b0ed3e9795863e4fc26b4e82bc9079ca81fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, suggesting an attempt to distribute malicious content or phish for credentials. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://crewmak.ru/uplcv?utm_term=how+to+set+up+webmail+on+android
    • https://xn--fct8ml6mwue.tw/uploads/files/bulerajelafuboraxapokuse.pdf
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/47842440813.pdf
    • https://doublehaircenter.com/upload/ckfinder/files/62642233210.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dd024de2f---pedoxavesefatuwovijuwu.pdf
    • http://mcdanielz.eu/files/file/zofaderixovazuxave.pdf
    • https://kheops-so.fr/ckfinder/userfiles/files/wosigitilapa.pdf
    • http://urdu-hadith.com/survey/userfiles/files/2764716086.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133ab4873769---803778431.pdf
    • http://kenhquangcao.vn/uploads/files/wikegatavaw.pdf
    • https://hotellemaritime.com/hotel/upload/files/fokifenipatad.pdf
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/gelotarawosa.pdf
    • http://tingchucontrol.com/Uploadfiles/files/61196396081.pdf
    • https://alexspa.pl/userfiles/file/69244635395.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/buvaxovudobu.pdf
    • http://vietcem.vn/public/default/ckeditor/files/75205243314.pdf
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/96805747051.pdf
    • http://studioiulianella.it/userfiles/files/81414688170.pdf
    • http://oldadmin.k12cart.com/media/files/9318699061.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161422c05a5e79---76407345609.pdf
    • http://driver-jazda.pl/upload/file/siwijinejakakubesosumokus.pdf
    • http://www.majbrno.cz/uploads/files/22969776471.pdf
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/39138661837.pdf
    • https://bloomland.com/sites/bloomland.com/files/20706342869.pdf
    • http://slesnick.net/userfiles/files/pepaxigobubamupotodu.pdf
    • http://bushurov.ru/images/files/27827931136.pdf
    • https://capecoralliving.com/media/file/dakuxefarakuveg.pdf
    • https://abzesolar.com/uploads/files/levonubaf.pdf
    • https://vnmmalta.com/userfiles/file/31172030870.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beaa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAA 16792 bytes
font_01_sfnt_off0000d6bc.bin
da1d4d3164c244409ef3eddcc111d4732daeaf394715af7bcfd21782ce7f45f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 18432 bytes
font_02_sfnt_off00010725.bin
c48b2fceb0c14dd9c012049c15319e90193360a4f3909aa1be90cee29efcffc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10872 bytes

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