Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fc5496a631749e…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 05:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dab2ab5b5359ec11726371104767553 SHA-1: 9c5f37ae3e7c443dd73344c91060e24cf8d780a4 SHA-256: 98fc5496a631749e97074251e2f1d65bfc0e2105052eaaeba1d107c6e3392e61
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://soxebez.ru/wix?keyword=evaluative+criteria+refer+to', which is likely used to redirect the user to a phishing or malware hosting site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs and the overall malicious verdict strongly suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://soxebez.ru/wix?keyword=evaluative+criteria+refer+to
    • http://lnstagramverificationbadge.com/58901467884ktjdi.pdf
    • http://aycotoro0.xyz/microsoft_wireless_notebook_optical_mouse_4000_drivereabom.pdf
    • https://cdn-cms.f-static.net/uploads/4383340/normal_600a1462f0d68.pdf
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5ff86dc4aedcc.pdf
    • http://sunazeremitiwu.mypressonline.com/oracle_database_pl_sql_language_reference_11g_release_2.pdf
    • http://rankingcoach-seo.com/xogabolizrefss.pdf
    • http://vivekawiga.sportsontheweb.net/the_childrens_book_of_virtues_by_william_bennett.pdf
    • http://nadipewin.mywebcommunity.org/fakimavojelaweb.pdf
    • http://risumeboze.getenjoyment.net/voicelive_play_looper.pdf
    • http://good-production16.site/64368898038rivq8.pdf
    • https://cdn-cms.f-static.net/uploads/4464524/normal_605518901a0ec.pdf
    • http://zitarekatinupas.sportsontheweb.net/25475081293.pdf
    • http://nanonewe.scienceontheweb.net/how_to_repair_the_heating_element_on_a_dryer.pdf
    • http://wdd13.ru/vumont2xyy.pdf
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6035be93a29ec.pdf
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fcedcd017202.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_46c7e0846832466dbd2b655ab0a0d93f.pdf?index=true
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_d563ddbac5a34d79810845e35c6c757b.pdf?index=true
    • https://s3.amazonaws.com/zoxewudunigus/new_holland_lx885_parts_diagram.pdf
    • https://s3.amazonaws.com/muvazi/97110102240.pdf
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_efef546b3dad4ae897cb7d2a294be001.pdf?index=true
    • https://s3.amazonaws.com/vatosolikijike/electro_technology_n3_study_guide.pdf
    • http://nukilaba.myartsonline.com/sitalikadorob.pdf
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_23311c028ab3458ca93bba978a2e7193.pdf?index=true
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_7482a690d1774215bf20dd3d620bba94.pdf?index=true
    • https://s3.amazonaws.com/nilititonawafim/template_border_for_wedding_card.pdf
    • https://s3.amazonaws.com/guxosa/66768552082.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f632.bin
c549e5767372d80fb8b369abb1a063ad462b3574081773c0fbafa8616cef0529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 4716 bytes
font_01_sfnt_off00010656.bin
11df350199361f4761cb8ac4220eeae262b940c8875202c464780b5dbfb7f55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10656 10488 bytes

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