Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8f469e943982b6…

MALICIOUS

PDF

83.5 KB Created: 2021-03-15 20:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bde7b9315fde8adc6e99243b90f58eb SHA-1: eb7e4d4993e3b57fc8008274efc87b371bdc492d SHA-256: ca8f469e943982b6ed19704d86545e9c4192047917840916d645d2a7aef158e0
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to 'https://zajinet.ru/award?keyword=pruebas+filtradas+ser+bachiller+2020+pdf', suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=pruebas+filtradas+ser+bachiller+2020+pdf
    • https://cdn.sqhk.co/rufebumu/3kwgdCJ/69206870585.pdf
    • https://cdn.sqhk.co/rezeribevi/jejhhag/color_block_mens_collar_shirt.pdf
    • https://cdn.sqhk.co/pafevola/iavjhTB/noxuzufupenezezopem.pdf
    • https://cdn.sqhk.co/fupokonabat/dIlicNM/27384760150.pdf
    • https://cdn.sqhk.co/mezawuso/cDhcvhf/10861826646.pdf
    • https://cdn.sqhk.co/mewedenemez/jdhchkz/3429961207.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purixifusipelid/nefokutisijakokelaki.pdf
    • https://s3.amazonaws.com/gozifep/zara_mens_shirts_size_guide.pdf
    • https://s3.amazonaws.com/vavapekadoliti/como_ler_hemograma_anemia.pdf
    • http://nanamiw.epizy.com/checkbook_balance_sheet_example.pdf
    • http://kemeterotef.rf.gd/sokowikikalosavi.pdf
    • https://s3.amazonaws.com/gafedupeba/pusevitojuguwerovon.pdf
    • https://s3.amazonaws.com/puretulenuza/why_are_porcelain_dolls_creepy.pdf
    • https://s3.amazonaws.com/toliwudalamem/xotejafamosodabazozifose.pdf
    • https://s3.amazonaws.com/fejatepudopito/esl_superlative_worksheets.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/69901296777.pdf
    • https://s3.amazonaws.com/bipovoromoj/ziwuzabiwixibub.pdf
    • https://s3.amazonaws.com/tetenifeme/3725847465.pdf
    • http://madanekobovuge.epizy.com/nubepozepakukedizenup.pdf
    • https://s3.amazonaws.com/moduluzuxikari/home_appraisal_report_how_many_days.pdf
    • https://s3.amazonaws.com/xelimewat/kulogomiwewibizubuponi.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d3.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 6744 bytes
font_01_sfnt_off000104bb.bin
76d347bf6ac03b895b4d39a7aa030316ecd82dd40864e62bbce570551345cbdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 5660 bytes
font_02_sfnt_off000117f1.bin
6cb0dc6806ce2f43f6ca0959f72a15599c9f3901f555232d5ba625f4be6c6eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F1 12524 bytes

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