Malicious PDF — malware analysis report

Static analysis result for SHA-256 4941da0aa77bb469…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 14:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 22efc411b7b4b8bd4ce272235dbc0cd9 SHA-1: 3bebda94943d6c4571a44fa45351dbcf295ce6ea SHA-256: 4941da0aa77bb4696974f1ff2cd71310e0a3c3548fbe22add6d3ce93f23ce8ec
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure impersonating Walmart, directing users to a link that likely leads to credential phishing or malware download. Heuristics indicate a link farm and a phishing lure, with ClamAV detecting it as a 'Pdf.Phishing.Trojan'. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users via a malicious link, potentially leading to client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/xakabebazejoronin.pdf.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/award?keyword=glossary+of+financial+accounting+terms+pdf PDF link annotation
    • https://cdn.sqhk.co/wanoposuj/gdc1Ct3/48788335739.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/xakabebazejoronin.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/iahgxgg/31956829195.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ighac70/buwisifejilosaw.pdfIn PDF document text
    • https://siketaxugulus.weebly.com/uploads/1/3/5/3/135309361/ed9e88ad.pdfIn PDF document text
    • https://gikowotezura.weebly.com/uploads/1/3/4/4/134493608/vesiwef.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/djaUzia/55121483395.pdfIn PDF document text
    • https://cdn.sqhk.co/watagovu/ghhdEgi/king_s_college_london_business_management_foundation.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hj66hbE/k12_online_school_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/d2hayp8/67725413404.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/eicggif/drive_simulator_2016_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/eGPvicr/ignite_rechargeable_usb_lighter.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/muwomapotumugi/60362126566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f84e7a1-09a7-4778-9cca-c97ae18a210c/wusexe.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/meconium_liquor_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47dfe2d-a28c-429f-85de-b1dcdf58c8a9/35817424047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b19fc94-1956-4f3d-bc82-66f61cbe3202/police_chief_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/42566571190.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/sotiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1a407b-fde2-454b-869d-cf5ef9c8d3e5/theoretical_and_experimental_probability_worksheets_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/ibps_rrb_2019_application_form_last_date.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5608 bytes
SHA-256: 0b5eb7dc4e0e7dcab3a8d419fa584029b409a27d3fcbc4fdcb1a147b3b2bbb78
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 10936 bytes
SHA-256: f97f934e421d5151172a1ae831f4d95012a6308bd31ac20fbe9ac2dd3b795405