Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc48d563631f3970…

MALICIOUS

PDF

83.6 KB Created: 2021-08-03 05:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2f7a80f14acdf406d8d58d9056cf165b SHA-1: da45c950c0af2b06214ea908f2ae1fc01fdafa07 SHA-256: cc48d563631f3970daa107da7aa533ffc6183bc5aa18a21ce71f57ed5f6160c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many hosted on compromised WordPress sites. The embedded URLs and the nature of the link farm suggest an intent to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://archism.ru/uplcv?utm_term=how+to+bypass+youtube+download+restrictions PDF link annotation
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f99e3e3764---64009735627.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/malenalibunowo.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/63660423871.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/pexetilidenalofexurimazuf.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/30428321120.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//90201404641.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8vtbk2krs523f3jultvnm6nled/ruropete.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/v48gdalm2a05enneb12l9loho3/79706767100.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8528558f47---kixax.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/siwegosokomeg.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882d33b7a8---62351223683.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/lodomu.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///22957974890.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ee53f62b---kelimuxigetuzola.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607755ace7203---91431412572.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4712dd439---fimujuzovovejabidopixu.pdfIn PDF document text
    • http://beiks.info/public/file/busomutusejibibe.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/doxixom.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/58320731938.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/lipesekojugag.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/94574653692.pdfIn PDF document text
    • http://secretinvitation.net/images/files/gajogimenunipogobafo.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_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 16252 bytes
SHA-256: 79b956baff1b26e73df4a77998735c9616b5713a1fec594099e7dae937a2fd76
font_01_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 10936 bytes
SHA-256: f5700943ef099e3bf335c354307300c6176560a5cd2153544926e1f5c83231db

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