Malicious PDF — malware analysis report

Static analysis result for SHA-256 253c8acb0fee0300…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 05:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6d4abfe42e0e28e612039e5364453ca7 SHA-1: 58c34dfba0429431d540c72d2d3409681aa93a52 SHA-256: 253c8acb0fee0300300676abb6916b286cccbd89b0f4feedae3910cdd6074e95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to potentially malicious domains, suggests an intent to redirect users to phishing or malware-hosting sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://madhubanindiancuisine.com/nbloom/fckuploads/file/guvokageneburudowidij.pdf In PDF document text
    • http://scro.ru/pic/file/vedixade.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/dowog.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/37296555418.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/60102286265.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/saviruwefavepijomefotog.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210905_123339.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/91338243668.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/zunozisaponotalotafidiza.pdfIn PDF document text
    • http://limoride.net/gallery/file/jimarifojubijazatixezuwi.pdfIn PDF document text
    • http://imbirimbir.ru/files/kalakirebejogat.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/pufezupixalalu.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/xewoduwet.pdfIn PDF document text
    • https://ekransamara.ru/files/26519491900.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/98290451706.pdfIn PDF document text
    • http://poorclarescork.ie/images/wuzisumimexa.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/fuzowuturibiwowepe.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/dofuduvefewavofovujijubo.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/rarubi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/guxunaporaramopubapajoken.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131dc1fc4183---80838039155.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/movisasa.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/zepalejedesiluz.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/xebozotevusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=como+ativar+gerenciador+de+download+androidPDF 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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 19260 bytes
SHA-256: a2a90c242aea746b0dd0f8a93a409df738e530dbd4bdc6df06a0ea06651f1108
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 10728 bytes
SHA-256: 4521a57573c884e6e3e8695b92517c2ad7e6bb2cacba9c5f15cc1c6f250f0d46

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