Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8afebe0f34ff1e0…

MALICIOUS

PDF

81.8 KB Created: 2021-09-21 10:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9f5153b79f8a651700b12ef32d2bfdb1 SHA-1: ea48c1192061a09967b670342fb41cf9af2f9e90 SHA-256: d8afebe0f34ff1e070b90c3925e36b286a91d6b5b89db8a802bec5f4fa3f59d6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://tubesealer.com/uploaded/file/12711742836139dc01c9a57.pdf In PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/86403270380.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/29482772707.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/43286693839.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451850ebb61---86063797262.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/bamewuwawogizod.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/balevopijerefa.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/83708223506.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/gesepewim.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16149657d0a557---64976006977.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/bulunisobole.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/1549825509.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/guxinafefuzaw.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad61f1b677---deloredawavajire.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f393d9a82aa0909515be8c2ef22048eb/31723181868.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/jotamafeleledonabolodo.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/53108480338.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/fedexifegejofiwil.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/meruvivomizaliwivatezarop.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/kagijipalolexoxu.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/bd33d8e9cfde3b33cb63ebb1b4067191/romeredi.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/fobavazofolujolese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=farming+simulator+16+download+mod+apkPDF 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_off0000db35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB35 11080 bytes
SHA-256: 6d92047bf60023b58ea9f7805198e0d5ae43c3ddfa3b68b84d568378ded5c7f4
font_01_sfnt_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 17272 bytes
SHA-256: c7836b918547bc420c944052410c963b2f9923e0f017c7b1334f8f0f7538626d
font_02_sfnt_off00012195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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