Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6929fa76984fd6…

MALICIOUS

PDF

70.8 KB Created: 2021-09-27 23:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b5f605165f5adbc0312e7483a60a2a54 SHA-1: dadb58f05a6cc73d0603dc821f38293dbde0f5e6 SHA-256: 9d6929fa76984fd69188d3b0276dd188a42092947e80330aeade51fa7ccf996e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to 'crysiq.ru' with a 'movie box pro app download android' UTM term, suggesting a lure for potentially unwanted or malicious software. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the PDF is used to distribute links to various external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://crysiq.ru/uplcv?utm_term=movie+box+pro+app+download+android PDF link annotation
    • https://mptradingcompany.com/userfiles/file/kulugavogifajawitarobe.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161512d1acb757---lesuxaw.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/xoganizuwisivakeju.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/54667904704.pdfIn PDF document text
    • http://rapet.hu/files/4244203946.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/davalawataxun.pdfIn PDF document text
    • https://xn--dokumaanahtarlk-llc.net/userfiles/file/70160152036.pdfIn PDF document text
    • https://susta.vn/userfiles/file/46203195453.pdfIn PDF document text
    • http://salt17.com/userfiles/files/mudofakat.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/kovekamifoxuvelupekobi.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/vekig.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/30089128904.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/muwojuzaporo.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/94703804567.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e11528e5b---58702739926.pdfIn PDF document text
    • http://cudicio.it/images/file/52586706912.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/58427223430.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/60489345519.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/46833211449.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/jepodo.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/95784315266.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/47654196782.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/4933912600.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/ralanerex.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/kuzolunemolofajaku.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_off0000b3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AF 16252 bytes
SHA-256: 4b7c93222b7692ff9e81f8d411613e50b65ed916ecbbf35a46fc924708011ac2
font_01_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 10508 bytes
SHA-256: 091ba3eba79fd81699017bae7dea606089cea75d77fc5670be008c5422ab18f8
font_02_sfnt_off0000f4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1