Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84851672ebf869a…

MALICIOUS

PDF

87.4 KB Created: 2021-02-24 16:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 464c8bd7e72fee672049b08374a176d1 SHA-1: 2a3df653e596a3557121fe319aff86288aadc40b SHA-256: c84851672ebf869ade49f7265819673a4eebecb692194bcda5995736fc77e772
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://jottigo.ru/award?keyword=excel+vba+find+string+in+cell PDF link annotation
    • https://cdn.sqhk.co/wemojezuvegi/dshhghc/motorsport_ireland_karting_calendar_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/b5A9tNG/censor_beep_sound_effect_long.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/7jdjbgd/mubutopitanos.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/why_is_my_dishwasher_not_fully_draining.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/como_se_hace_un_manual_de_usuario.pdfIn PDF document text
    • http://top-shop-store.website/fewewezetesexagezakesikabhwc72.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/42535558692.pdfIn PDF document text
    • http://raisinshq.pro/dupegojazulipumamee1rh8.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/sefipa/bridge_load_test_report.pdfIn PDF document text
    • http://jarebavax.epizy.com/lullaby_trust_safe_sleep_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/gowozukawemapimabafu.pdfIn PDF document text
    • http://rejinivak.rf.gd/sudagumudagikeramexe.pdfIn PDF document text
    • http://lazevemu.epizy.com/young_thug_power_music.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/30363928410.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/the_heir_kiera_cass_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/vidalia_tor_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/xixupegajepupepidekos.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/jisadurobubaja.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_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 5412 bytes
SHA-256: 4d9e94ecf66f0edadd254d3ad08e1bceb896aca4dadc53006aeb6639b7076e53
font_01_sfnt_off000121d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 14960 bytes
SHA-256: 9fc618740c2ab24f2fbbb0206913f1d4ae00a33a37b0d0351251b3def3096112

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