Malicious PDF — malware analysis report

Static analysis result for SHA-256 992c602981802196…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 02:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df58d1d4c0bcdb71d047226c14a6ca4d SHA-1: c90055de092841800a5ba9572f4d974dad82e4d3 SHA-256: 992c6029818021962d7effcbe77a0c3a2825b966d23ed1753daa8f3f92b451b5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that leads to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a social engineering attack to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=3+digit+addition+worksheets+no+regrouping
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5ffcffd0d1beb.pdf
    • https://cdn.sqhk.co/bupedamarib/gflKjgU/12695356832.pdf
    • https://cdn.sqhk.co/vavewiminiv/IMidgfs/76565680067.pdf
    • https://cdn-cms.f-static.net/uploads/4381730/normal_60439b0fee394.pdf
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5fcc5e7e95544.pdf
    • https://cdn-cms.f-static.net/uploads/4461791/normal_6041ed6d6a45a.pdf
    • https://cdn-cms.f-static.net/uploads/4405945/normal_603d57e262dd1.pdf
    • https://cdn-cms.f-static.net/uploads/4491173/normal_5fd66535b8267.pdf
    • https://cdn.sqhk.co/pofaxiniraz/hf0gdhq/internet_speed_meter_lite.pdf
    • http://meetsoda.pro/ge_universal_remote_codes_for_onn_dvd_playerj49j7.pdf
    • http://levantegroup.net/9760511772f8atc.pdf
    • http://khareedforosh.com/583730881147a6kj.pdf
    • http://axecheat9.xyz/what_is_the_best_bible_verse_for_healingtutii.pdf
    • https://cdn-cms.f-static.net/uploads/4463565/normal_6023b84db1183.pdf
    • http://center-san.ru/insteon_dimmer_switch_not_workingwglzw.pdf
    • https://cdn.sqhk.co/desogepupema/Rahe8oe/pulinojatun.pdf
    • http://otomail.business/jopiwaj5zq8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wolawatin/suxunonazasasuwisagubuve.pdf
    • https://s3.amazonaws.com/zerejibixupav/47463230341.pdf
    • https://s3.amazonaws.com/kubedukowug/prepositions_exercises_with_answers_for_class_10_icse.pdf
    • https://s3.amazonaws.com/debamijizozexo/free_vpn_for_pc_psiphon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2da.bin
3d35ec984303652da5e80274960615ef7d374a15cafea5661c5174c9c34e4fa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5412 bytes
font_01_sfnt_off00010551.bin
e0ee0d68fde201e7088d0d4feac651be1cbd961713adeb54ffa4fcf45476504d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 10880 bytes