Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a7ec8e7e7c0d02…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 05:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0006756de930146670023de31fbe94df SHA-1: 5672209027644d439c465f322ed7693fae815bd7 SHA-256: a0a7ec8e7e7c0d0262df98f6e258056e1775631ff446794f3c4b384b7c706707
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The primary lure appears to be a game download, as indicated by the URL parameters. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=download+game+marvel+vs+capcom+android PDF link annotation
    • http://nhatrangpalace.vn/app/webroot/upload/files/giweropifepado.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/83875473001.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/80444565461.pdfIn PDF document text
    • http://scsytech.com/upload/files/wuxutituxa.pdfIn PDF document text
    • http://builderall.info/userfiles/file/zupoto.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/kejugatifavat.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/59682622442.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/99153866280.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/redejo.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/tujisirekagoweda.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/49403399280.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/rixefemi.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pezunefeduwuxom.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/59270195574.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/tibexepofulavap.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/bebekigazogukolijujumeru.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/xikerasuxe.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/18973974968.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132f354d98a1---86445776699.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/50166877274.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/157648904.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/vikumimaranudotuwodaduvo.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/4093793150.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_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10912 bytes
SHA-256: f8cd8ee86043545333ac95579a369bdcc055495bbf02198e6461c56bfcd5d041
font_02_sfnt_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 18124 bytes
SHA-256: e8abd99e293a78eba8cc35f675c54ed4d1f0448c65d351c1ac4830efed0c7759

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