Malicious PDF — malware analysis report

Static analysis result for SHA-256 47aa880d3551d1a7…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 23:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 65737d33d0b8b86ed59f8f1fbcfb99a4 SHA-1: 047ffa07e94c836125c695be2a75ecf3b515385d SHA-256: 47aa880d3551d1a759a1d083a4582db5a385861823b7f8e3c23187b304b35835
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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=multiplication+table+of+120 PDF link annotation
    • http://bsinteriordesigner.com/userfiles/files/23906061513.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202162110515.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28ebb5113d---gofaroludexa.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/99732892972.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/aa1897a065bb6d363df6ffaaa0ccd1a1/98391838865.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957ca603d5a---pujodijekadudijeramanawat.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/66637197101.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074694069273---76270617791.pdfIn PDF document text
    • http://alkanboya.com/files/file///nutiwawizifukejumeg.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/99i0ns31o27nis22dnph407vvv/giwewapebexijibazikefupev.pdfIn PDF document text
    • http://ciskmv.com/css/file/40011301110.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/lowivi.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/99923706064.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/39393651931.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/65839084530.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16258916441368.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/fnvgcmj9lj773ouvmmhaaq0k34/wukede.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/liwetolemozexid.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088662839fbe---32267849957.pdfIn PDF document text
    • http://grandchainfamilyfoundation.com/clients/85333/File/87578172958.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160864a228b67e---fukabajisa.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608af4577e579---68960303832.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/vomujiguti.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/basanefida.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16108fcc8c49ce---lidurajoj.pdfIn PDF document text
    • http://ty-int.com/files/files/fizenagujazebexakikajo.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_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 10732 bytes
SHA-256: 64323cfbe15de8d5a3525a95dcc8e0683edf757ded475b56d1e4cae3f11f40f5
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 19280 bytes
SHA-256: 690192eed664c166703a5c6c06cb5baadc7df5a2bc7049b0aba5f3313367f817

Open this report in the interactive analyzer, or submit your own file for analysis.