Malicious PDF — malware analysis report

Static analysis result for SHA-256 82368c8fe866bbf9…

MALICIOUS

PDF

67.4 KB Created: 2021-09-10 22:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e821114a74a175f42a1ca5900bc39dde SHA-1: ade169be259fe0fd66a2778c0368e9b661360494 SHA-256: 82368c8fe866bbf9d6ae597c8a0894ccfa2bbcdca9e3ea251442aac9918929f4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with a clickable action, designed to deceive users. Multiple external URIs were extracted, suggesting a potential distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.bnbtravels.com/ckfinder/userfiles/files/disuni.pdf In PDF document text
    • http://dentalweek.eu/userfiles/files/69146598279.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/48436998230.pdfIn PDF document text
    • https://niagarablock.com/application/webroot/userfiles/file/vodapideleg.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/90677143789.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/duxubelodagogen.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/b59ff37c7986c741e6b2c20ddf90c428/xevibujaluboz.pdfIn PDF document text
    • http://abnicum.com/files/file/rekofelisalofafuj.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613645fe1b199---xazorimidejewiturekogi.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210910154929.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/82085198297.pdfIn PDF document text
    • http://01host.ru/userfiles/files/fidigofagirebaf.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/xuropakerekunavod.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/danotinejijebumo.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/dakemokosidagorofale.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/goditadetarenojubarok.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/zegej.pdfIn PDF document text
    • http://elektro-galerie-hamburg.de/userfiles/file/jofonoruwijigunatanilo.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/mixekagawoze.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/birevuboburepareloganuxul.pdfIn PDF document text
    • https://mashura.co/userfiles/files/sixekirivavutolavilize.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/28975812507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pop+up+blocker+for+android+chromePDF 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_off0000ac4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4F 14280 bytes
SHA-256: 933b3b7b63aad3b3e94365cc2fc2a027f5525035dff8a2c7e2d6963862d174be
font_01_sfnt_off0000cf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3D 10952 bytes
SHA-256: 6a0ab1397644dcb9b2c9b7a3be9503e3d2835ae0a8d66add94e147e13a338c98
font_02_sfnt_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1