Malicious PDF — malware analysis report

Static analysis result for SHA-256 22104d00b3bfa876…

MALICIOUS

PDF

84.4 KB Created: 2021-09-07 04:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: baa04206cbb7a8e7711fa3b0173f1608 SHA-1: 6b61830e67f9818eefb3d77515042666980cd0c4 SHA-256: 22104d00b3bfa876dbdd04b8d04bc3d930c5b63201991750e74a82241d133137
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to mimic an invoice or payment request, a common social engineering tactic. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://billedbutikken.dk/articlefiles/file/79570515148.pdf In PDF document text
    • http://krevue.cz/UserFiles/File/49361063641.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b33c8096---19751877474.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/80412052452.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/et39ee48v8pru9md1hehc4ara4/fixusevavisogikoba.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d685185bc4c---navaruvigipawuzutomiwofe.pdfIn PDF document text
    • https://retta-bg.com/userfiles/123786738.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/piwawofatudaf.pdfIn PDF document text
    • https://kawanmto.org/contents//files/tawisomerisoviwafavu.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130ec08dca53---36027109927.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/85982503660.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/zeboburukotagimetu.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210813_105908.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/vijonaga.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fbb07815ab4cae28757d93b51764c366/70531400304.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da63ef2013d---duxusesoko.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dce5fe582cc---tigetolataduzukisexasoza.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/25676395258.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/29734742290.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074477ac83ce---mufabimefazodixejose.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/fobinefafi.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/xavileseliveresiluf.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/88272505963.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/vovezal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=certificat+de+cession+vehicule+belge+pdfPDF 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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 20564 bytes
SHA-256: f29cfc6d486a2b377d34eed4b4da94b13fd6eb0fb952a0367a5f68904983d602
font_01_sfnt_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 11236 bytes
SHA-256: e94eb77b386c3125224f8041bac13ef9a09ecff0cad4450f2b1c352c7bcb31cd
font_02_sfnt_off000129ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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