Malicious PDF — malware analysis report

Static analysis result for SHA-256 622e24e391b6471b…

MALICIOUS

PDF

74.6 KB Created: 2021-03-28 19:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936953491c81f658b34436b2c4b3a61e SHA-1: 7bd23cf26ef0003ef346257446dfc9da54685c05 SHA-256: 622e24e391b6471b70eedb590e7bc18f126a124d871bb435937788de6c2c6b2b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of an external URI indicates an attempt to redirect the user to a potentially harmful website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=maths+multiplication+worksheets+year+1
    • https://cdn.sqhk.co/vemudumuxixu/gfgfjhr/sas_zombie_assault_3_apk_uptodown.pdf
    • https://gewilowada.weebly.com/uploads/1/3/0/7/130776716/b36532b17a7d558.pdf
    • https://dibekepoxifepef.weebly.com/uploads/1/3/4/5/134587143/debdc7bb.pdf
    • http://zunuruxeguxifi.mygamesonline.org/30785481331.pdf
    • https://cdn.sqhk.co/givesaxi/dicWC91/40359079311.pdf
    • https://cdn.sqhk.co/puxedepobe/ygg41hb/96077081095.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/subopukomanaw/checkpoint_vpn_for_mac.pdf
    • https://uploads.strikinglycdn.com/files/bff8d196-414c-416c-b50c-1d00856c77e9/sharepoint_online_administrator_guide.pdf
    • http://pekafujojef.onlinewebshop.net/zonekuganafoze.pdf
    • http://nugetagu.epizy.com/56343753387.pdf
    • https://s3.amazonaws.com/lebaxa/how_do_you_feel_chart_with_faces.pdf
    • https://s3.amazonaws.com/magapeguwabe/gupodaga.pdf
    • http://nununad.myartsonline.com/college_algebra_questions_and_solutions.pdf
    • http://kuwixogup.rf.gd/17333296135.pdf
    • https://uploads.strikinglycdn.com/files/b049d604-c59c-4a8b-a854-7cccd83fb6bf/how_to_pair_angelcare_monitor.pdf
    • http://bonizeza.epizy.com/cash_flow_statement_format_under_direct_method.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_off0000e6bb.bin
1ac848e8c4a680a3f13dfebee92797e796040e8c034c61f39970440fffb3eb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 5488 bytes
font_01_sfnt_off0000f95c.bin
457dafc7010d0c909466506771380013939cdfcace5dde59fd053361c552ceb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 10656 bytes

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