Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31359991d84fe2b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-03 01:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: eed6ccf9091b45a5d289c63df03118ee SHA-1: cafa237fb41ca4ae1c8e13c4260705cadb2bcdda SHA-256: a31359991d84fe2b59f9ad0e98d1a480a52ac957254ba4c84c9de0bec9982212
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. ClamAV and ML classifiers flagged this file as malicious, specifically identifying it as a phishing trojan. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=estructura+de+los+textos+narrativos+pdf PDF link annotation
    • https://cdn.sqhk.co/tosilura/djclRjh/best_hero_archero_helix.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/xx5zhim/shooter_cast_season_2_episode_3.pdfIn PDF document text
    • http://kawlites.online/contra_oyunu_indir18xfu.pdfIn PDF document text
    • http://keziwir.iblogger.org/31630010236.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/vWgcBjc/spongebob_movie_sound_effects_wiki.pdfIn PDF document text
    • http://remastacer.com/6238596329pwzv5.pdfIn PDF document text
    • https://cdn.sqhk.co/sevilebup/ouKmjeH/wumaridunekuferiwowu.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/igmIgcs/34135984635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/how_to_install_a_canon_mp250_printer_without_the_disk.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/dolaribedopobetuxu.pdfIn PDF document text
    • http://jelugubafegoj.rf.gd/purire.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/dyson_dc50_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/fiwosajolewo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 5236 bytes
SHA-256: d9e880f51d40f6bb95404e03c45ab3eb6893deb45fa6d640df9cb538abe97b4e
font_01_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 11676 bytes
SHA-256: 73ad5465e2cc8c85a36a88c7169a283dd6c393c745d3207e36ad9bbb3344bc0e