Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22e796132650a27…

MALICIOUS

PDF

71.0 KB Created: 2021-10-06 08:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bef7d8d968a853300a48e00a27c9ac8e SHA-1: 18f0c1e7b7b2b1e8b192821094c1aa2b13732254 SHA-256: a22e796132650a2799862ee3f5438db1ed3cc06b24ad2b7dc9627435e7b26bf8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam campaign. The PDF structure and embedded content indicate it's intended to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=double+light+phototherapy PDF link annotation
    • https://szallas-karpatalja.com/upload/rosagifumejozese.pdfIn PDF document text
    • http://cib.lin1.ca/phpsites/vertical_living/uploads/file/35750238262.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/zesetudiz.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/keligunipevelakugigevifu.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/67161529431.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/bewumadogavusitidabo.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/nexiveki.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/vumarepenekemovox.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/dajojoxo.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/redofisipi.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/25550943253.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613dee14638d1---99336453782.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/wuzanusenefipu.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/zutiwosugetitu.pdfIn PDF document text
    • http://kammed.com/userfiles/file/34366604160.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/boniladulepiwot.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/mijonovirokaxezatomotude.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/11810685520.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/6361241336.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/bediloziwesomadoxonoloj.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/15884184568.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/9091168220.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/gusuwezo.pdfIn PDF document text
    • https://svezadjecu.me/userfiles/file/15735442948.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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 10616 bytes
SHA-256: c9aa34aeec65830327c3b7a59b18c11f4b96cddfe03a81c64123a0091423659b
font_02_sfnt_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 16040 bytes
SHA-256: 326fefc14f23293001f1de40179595488f67b938c66ba96709f0b8b9cee026c5

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