Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecf7844bc193b53…

MALICIOUS

PDF

83.9 KB Created: 2021-05-23 05:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 71b704a53d3c1e3efb89bbf6913e9dc3 SHA-1: 59c546a38fe0c5e3502dcdd8c04e75e00123310a SHA-256: 7ecf7844bc193b53b4bffe338e409a80a85378d84bdd83ec60a69c6a0cdd1ca0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'mezovuduw.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate a likely attempt to redirect the user to a malicious 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://mezovuduw.ru/strik?utm_term=the+core+competence+of+the+corporation+prahalad+and+hamel+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476294/normal_600bf356e95a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_606d16b70434c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5ff7c612f123b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_604317bc1ac9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b9cdecb5-458e-43da-abe6-76d1404f0aa3/how_do_i_reset_my_honeywell_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/aditya_birla_sun_life_midcap_fund_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff4d474-1a37-49cf-9e35-e1f4b11a7ca5/dasekirotividaregeruziguf.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/english_short_story_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727e16ff-9bab-40c5-80fa-74d7f7ace2bd/roku_smart_tv_black_friday_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a07488-5bed-4638-8576-d72a7d38dec3/the_help_kathryn_stockett_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d81da84-33b6-49eb-a3ff-bfadc814dde4/5031142914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf35f17-8a89-4d44-8e3d-a93335951f16/bpsc.bih.nic.in_admit_card_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/14322130076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdf220e-31d8-4b84-82d2-708ec7487323/wiwunufawenuxovobekede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5068ed-bd15-4cf4-bf81-ccebe9663983/the_pillowman_play_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf9fa68-fa5b-4c68-9cce-5407a241606a/vitamix_5000_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/87697142116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6febd5-7f27-4980-9b30-13ecf2c35cae/how_do_you_say_green_in_latin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c459d5-bebe-4951-be8b-bf9543d49f1d/blade_and_soul_warden_talents.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 4952 bytes
SHA-256: d5b26c50517ac161b6b3f736ea654a4681f513cc6a17be7bce4c222932687614
font_01_sfnt_off00010d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 11140 bytes
SHA-256: 782456596b5ed9ef50a1021ccd9cd1e688fc07e5d060fce4011445ed0088639a
font_02_sfnt_off0001337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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