Malicious PDF — malware analysis report

Static analysis result for SHA-256 654bc3345a65f783…

MALICIOUS

PDF

86.3 KB Created: 2021-09-10 11:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c6a2e31e85f0ed38c0a67f714d860d8 SHA-1: 411cf623a1f2af6b7d56df6c7e820c7cff071f79 SHA-256: 654bc3345a65f783fe2013b2011b1ee6f8bcc412d32fe0b44af5b6f9da0ff1dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vangphutai.com/images/uploads/files/10311121837.pdf In PDF document text
    • http://sxsasa.org/images_fck/file/1630508471.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/59137972944.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/nidevofidufomesowexajeju.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/16712463775.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/30851181992.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/33554430694.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/xulelovemawukutef.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/88271664562.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/xumofumojonenanor.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/zowal.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/aea92eeca8563b2648f27ce73390186f/jupilifi.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136a8a891f23---59908213781.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139ea8958aa0---medirufivixe.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/rewejifazajatem.pdfIn PDF document text
    • http://mcutech.net/files/nijemirulemetib.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/katuze.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/e19f962ab77a8e0d8a9b0eede65c983c/93354556083.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/75511545150.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/zulodunez.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336c70416d5---tojezajobapuzemujatovo.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/17362509861.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/22368982256.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33a59382524cfe34bbe6b0b67c0e935a/gegukovivevum.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/zusivusudavagezomiwinudos.pdfIn PDF document text
    • https://qnzar.com/files/selitanapodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+android+phone+clone+appPDF 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_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 10664 bytes
SHA-256: 90df0cdbcbc114308636e1bcb60ee7590c7448c87dcc64f5b4e6d668348d7455
font_01_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 17576 bytes
SHA-256: 0bd3a0d7ed68ccf7a4cda556cecbd8b59588e0f9d32c78e1349d49dfa321dca3
font_02_sfnt_off000133c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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