Malicious PDF — malware analysis report

Static analysis result for SHA-256 858f6e77f2b2485e…

MALICIOUS

PDF

78.9 KB Created: 2021-05-08 17:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2880a201a251e6ed88f125b2df17682 SHA-1: 7a4461e6c3c9b82270587f48254309d83a301256 SHA-256: 858f6e77f2b2485e2a526d18f3368eb55c5222fd22de689af37264112a2c63f4
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, one of which is directly linked to a heuristic firing for an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing or trojan delivery attempt. The document body, though heavily obfuscated, suggests a lure related to educational materials, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=maths+worksheets+for+class+8+rational+numbers+pdf PDF link annotation
    • http://datingsexchat.site/565508035194bewn.pdfIn PDF document text
    • http://servempieza.site/how_to_use_metaphors_in_descriptive_writing0g6nq.pdfIn PDF document text
    • http://logoped-samara.ru/v_wason_accountancy_class_12_solutions77fdo.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/ib0q1ig/skater_skirt_outfits_with_converse.pdfIn PDF document text
    • http://jezakomesudo.22web.org/jijabaf.pdfIn PDF document text
    • http://nejoxulogawa.22web.org/what_are_the_specs_of_my_pc.pdfIn PDF document text
    • http://daddytestit.xyz/794132970722npoe.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/dhexjid/41205626499.pdfIn PDF document text
    • http://niwobupiku.iblogger.org/fifakegoku.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/hisMRig/summoners_war_rune_optimizer_download.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/bulozor/koxunuxekuxizadelisiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36edaa94-0821-4cc9-bb0d-dc4a0b6e7a0a/how_do_i_update_an_old_kindle_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/boosted_performance_mooresville.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/what_are_the_4_ethical_principles_of_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d6c39c-4511-4b6d-959d-c2ddf3e013e3/47370777244.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/cheetah_3d_cracked_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae7dabf-8e42-41fc-b471-c9efb8ee7e65/weight_limit_for_total_gym_1400.pdfIn PDF document text
    • http://tujotabupogi.rf.gd/how_do_i_stop_my_brk_smoke_alarm_from_beeping.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/laparoscopic_cholecystectomy_video_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af533d79-efa0-443e-9c9b-7090eb19cc22/kerive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28bff965-078d-4a13-9981-e7233221326b/best_calorie_counter_app_2020_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/sex_and_the_city_cast_1.pdfIn PDF document text
    • http://laraderedo.epizy.com/plantronics_voyager_pro_uc_v2_bluetooth_headset.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/what_order_does_the_alex_cross_series_go_in.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_off0000f21c.bin
56445e0eab469b35f0780b10e405513bedc37d22d34e0fa5d730e7f878924b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 5892 bytes
font_01_sfnt_off00010616.bin
2d6f419b42b462ce799bac9ab9a130b28d8f24d367c254cd68568032f54e5a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 11660 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.