Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70e38d3cd8c9295…

MALICIOUS

PDF

78.9 KB Created: 2021-10-05 12:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3e08a0b988df248d0fbfd07802427c12 SHA-1: 322d676e53af5e1935b1f5f5d86e8d22272a6784 SHA-256: b70e38d3cd8c9295bce2ade71aa7626be7af6fb80ccb475f707379ec58bec1f4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's designed to exploit user trust and lead them to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://studio-orlandini.com/userfiles/files/26605428562.pdf In PDF document text
    • http://cke.hk/userfiles/kamome.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/lusesigedopevonowetosoj.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/50982062020.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/38072374732.pdfIn PDF document text
    • https://zakazspbwatches.ru/upload/files/15731483680.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/muropis.pdfIn PDF document text
    • http://congress.bpv.su/content/files/files/9429830281.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143c696e3d41---93213914780.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/42866930607.pdfPDF link annotation
    • http://nano-vip.com/ckfinder/userfiles/files/belotosewonodali.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210910_6A48E2012871FE58.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614db11685ddf---detozevabimib.pdfIn PDF document text
    • https://subded.org/userfiles/file/40084652927.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/wadag.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161502e5a4d335---23549536423.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/15923193150.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210926065218.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d20b2bd5---fotunelezodilogenaxobunu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/40541846307.pdfIn PDF document text
    • http://melvin.cz/data/8458547814.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/21766844259.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/jovuwisadeviguxagovo.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/loseradavujomelinegulotor.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/47807417388.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/fekikijufuviriwuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=st+christopher+ophthalmologyPDF 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_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 18168 bytes
SHA-256: bbca1bd25046a0493d747572eae06469645d6d62164438059e59c84fbf5dbf35
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 10904 bytes
SHA-256: 7ca80c2bffe5c92d222942379cea61aee05b957f6fc8b926589030a343194d6d

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