Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f59df725d629c9…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 17:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d90bde10e42a1ab5884e1d5ce563f152 SHA-1: 31b8e0d2a337f376ccce4cdf1e1649802dcfd334 SHA-256: c0f59df725d629c9517a267ebc670b277505ebcc39a113d059856f1a64fe7424
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=our+moon+has+blood+clots+pdf PDF link annotation
    • http://nct-vn.com/userfiles/file/sidojinabobegap.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/22168229800.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/61523692398.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/96936508131.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/dagixosuvagifuzipugozulut.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/kamajebakojonoguba.pdfIn PDF document text
    • http://inspeq.eu/public/files/paxilupazola.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/gidifafawelijisopufujazo.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/91192337831.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210921170050.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/wexewujejujuzivuxovewowix.pdfIn PDF document text
    • https://arerp.kr/data/file///9222867566.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/kefoborixiwakasemas.pdfIn PDF document text
    • http://horvathortho.hu/tmp/50413864918.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/laxazoranozipasev.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021091211012273499.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/39555841193.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/87187416940.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/n195os6pr68cj3imk630run8n0/50044297939.pdfIn PDF document text
    • http://jljemc.com/upload/files/8743565170.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/farurekixomukokuvix.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/reragelufawerorakeroj.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/11686440601.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/fukozoxafixuzoku.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/bibiruwotatududusu.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_off0000b3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD7 10928 bytes
SHA-256: d3baf5ce97addfdce74d1d3ef8c90a89b081629657398439a28eb0317c070442
font_02_sfnt_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 15608 bytes
SHA-256: 08f032bc5f0ddd7a4188255de4930de238f20e04d0705452ac3c54bd7de07735