Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11a74a3beead747…

MALICIOUS

PDF

82.7 KB Created: 2021-03-30 06:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0a8be3d8187de04a4ed9cc8a8c79ee1 SHA-1: e087280161fc78705245ac487a3bdebf5567997d SHA-256: e11a74a3beead74789a80611178309ea3ad69f357f171306f625eb751a1f2d41
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged it as malicious with high confidence. The document body, though heavily obfuscated, suggests a lure related to a 'Falcon bms 4.35 manual'. The primary IOC is the external URI pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or redirect to a phishing site.

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://baarspo.ru/strik?utm_term=falcon+bms+4.35+manual PDF link annotation
    • https://cdn.sqhk.co/bixatavafut/hfgggKW/56228157809.pdfIn PDF document text
    • http://microdigitalmeter.xyz/rijegevuxizifufoxavwhpsi.pdfIn PDF document text
    • http://shothard.site/78764322076qrfow.pdfIn PDF document text
    • http://baltika-trans.com/spanish_short_stories_free_downloadsua29.pdfIn PDF document text
    • http://hot-money.fun/kesepotosumudupodgd3pv.pdfIn PDF document text
    • https://cdn.sqhk.co/zefadanexa/gfXrRW4/xalakul.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/domegagowevag/whatsapp_video_2019_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6e2d1b-a37c-4974-b300-a1e47638c9b8/sony_icf-c1t_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9481aa6-16ac-4bfa-b265-fd1a79c13318/61197835755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4c6d3a-8641-4049-8fb8-9daac5560455/sovifakoxugemakuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/mdpi_journal_latex_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9586565-ebd1-47fa-b660-9ce35671fab2/japanese_adverbs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a50e08c-0d55-43dc-b8e4-46e984aa0a3e/how_to_play_cello_suite_no.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dac37a1-6e3e-4c2a-98df-16ee472d8f12/visualization_analysis_and_design_tamara_munzner_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c1c5f8-f142-4254-b15f-2f426b74841f/que_significa_la_palabra_licita_en_la_biblia_ayo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957aea7e-5a77-4cb3-b300-ad629ae8933a/70001317299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aafeb61f-38eb-4a4b-b48b-8a5d1c7e4e4b/31997105995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311f60ea-6f6f-40a2-9ce4-924e8715ddfd/kawakawajerox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173f1236-8d7f-4b5f-b549-302bda6434d2/cuentos_de_la_selva_las_medias_de_los_flamencos_resumen_corto.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/xbox_one_wireless_controller_audio_jack.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_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 5352 bytes
SHA-256: 72ac68d98ac151d644ae08bca7ec3704adac202135a25ed8454007b884a8df0b
font_01_sfnt_off000113fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 12280 bytes
SHA-256: 3dafa5eb33871758c394dc8e6173ae837a6560767b8561331606c1b57d63c4a7

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