Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf22947c47229d6…

MALICIOUS

PDF

85.2 KB Created: 2021-09-19 10:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ede806b0ffe7f41b6297b16dc46d1b3f SHA-1: a616149895e6f8551dab813a885dff8101869cc4 SHA-256: 2cf22947c47229d60a1c3499b99b12ab48967e844dbba98be5de2dc497c0f9d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this PDF is a link farm designed to redirect users to external content, with one URL specifically mentioning 'grand theft auto 5 apk free download', suggesting a lure for potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://inwebjor.ru/uplcv?utm_term=grand+theft+auto+5+apk+free+download PDF link annotation
    • http://93564497.com/userfiles/58298769828.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/sexisirifogaxikezaf.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea1c92ea9---mazaxegevogorerazufediju.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/76416008628.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613441af4a98f---zizukeku.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/70291109717.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/19175709296.pdfIn PDF document text
    • http://opsir.eu/files/file/34992172476.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/zegufofunojejetuneki.pdfIn PDF document text
    • http://climtech.com/files/files/50859079169.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/givejubozaxip.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/31390292917.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1b60546c1---75436632153.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba5648a22---15055922539.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/sigilexidaronekesur.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/26554768526.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/22111895055.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/61757630317.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/49514080527.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/kanevetu.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__6145A9A9E7F38.pdfIn PDF document text
    • https://songhongresort.com/img/files/nirefitotadoso.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/lufedemuxebuzatikifidif.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_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 17456 bytes
SHA-256: 4ee2580e553b929adcb48acd6382834b35779e42588ae352df77eb6e499ca2fc
font_01_sfnt_off000115d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D7 10788 bytes
SHA-256: 07bf38e94ebe8c07e0ce13591b087498479f07fd50302a6617c9225cb20872b5
font_02_sfnt_off00012ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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