Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3542e44e3f8b39b…

MALICIOUS

PDF

84.0 KB Created: 2021-09-21 09:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 797dbd10d964ebe8251d12c54baa41da SHA-1: b35ff73abc41e82f5841794537cccff446863242 SHA-256: b3542e44e3f8b39b27e0f083a518fc73cc2cbe24ab37a3ccce51de7c945013d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, indicating a link farm or distribution network. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tecresconsolidamentorestauro.it/fck_data/file/jebujazupop.pdf In PDF document text
    • http://edallyshop.com/upload/files/xufebelavob.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/rowulenabugelirala.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/54556452025.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/modenonibizupuwika.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-17/20210917003548583942.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/gerijogomu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/26efcac1c8d770c179f178857b95caee/sabejafonajidis.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/kotabowake.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/97748392843.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614804aca8a7e---26747939150.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/kuxepomitunibipure.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/73703152560.pdfIn PDF document text
    • http://parentini.it/userfiles/files/38560456988.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/livakanamafaxadop.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/54992726084.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/kapiredoriwovozudajadel.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/97700339205.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/76509225595.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/tibesip.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/judoviditobibatowo.pdfIn PDF document text
    • http://boki.hu/editor_up/62867257285.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/88193318069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=auto+silent+mode+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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 10532 bytes
SHA-256: 275e6c01cd8ba57decc9e7cfc4cfbea5fd228d34b1ec599cabc6f95b355977c2
font_01_sfnt_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 19040 bytes
SHA-256: 7da4be1c147280b3e61dd3527aa04a7c2b57699d16ca387b8709e5bcc390fe9b

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