Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5094db5c74d643f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-10 11:37:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 877bfb27c28af7557c653afc12ca2bc9 SHA-1: f6ec1e559d38d33f1e0aa7204bdc96f82c3efcff SHA-256: f5094db5c74d643f18d548f2d35883140f7921b0c078a79bb27001cb72c1cec2
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, mezovuduw.ru, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

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://mezovuduw.ru/wix?keyword=symbolism+in+catcher+in+the+rye PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fd0e72375e05.pdfIn PDF document text
    • http://torchland.xyz/653106988159kn77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_603e5a9a84ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_6000f6a14dc2e.pdfIn PDF document text
    • http://pristav.pro/free_games_dx_ball_5frlsg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5ffbac5dc7995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cbc82b-8190-4dc6-9ee1-17a1feeddfe3/apc_backup_ups_cs_500_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905a1322-e498-43f5-bcd4-5800d42a0212/python_dictionary_pop_random.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/ielts_reading_passage_job_sharing_answers.pdfIn PDF document text
    • http://podemerobetalax.epizy.com/bogan_movie_bgm_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/12558444206.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/clavier_qwerty_azerty_android_tv.pdfIn PDF document text
    • http://jutidijuv.epizy.com/what_is_project_management_all_about.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/gefabixalawexabinuga.pdfIn PDF document text
    • http://nibekiwimuzev.epizy.com/clasificar_los_numeros_enteros_racionales_e_irracionales.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/animal_adaptations_worksheets_ks3.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/minority_report_name_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/67942390929.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/fannie_mae_guidelines_on_disputed_accounts.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/41236476043.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_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5384 bytes
SHA-256: b03fe6d43ce1e9acdc722271c13452ecca8888772b611214e3884c84fc3dbc2f
font_01_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 10148 bytes
SHA-256: dba7a3415de09dc3f2ed202a4d4d3fe9334e83801ffcd208540f230ce3d98ea5

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