Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a6ce8247924bed…

MALICIOUS

PDF

82.0 KB Created: 2021-04-04 01:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7c8ca252bdc991685a70d75fae4888f8 SHA-1: 2f7f6dac8de626adcee31c2e97af475803132fca SHA-256: e3a6ce8247924bedbffbe4584cb0925e2ac1e2e11817b12b7fbd6e5e460c2bfd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The sample was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing (AMAZON) and a general ML classifier. The embedded URLs point to redirectors and potentially malicious content, with one URL specifically mentioning 'strik' and 'utm_term' suggesting a phishing campaign. The presence of PDF-specific heuristics indicates the document is designed to exploit PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/7261881.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=night+owl+security+cameras+4k PDF link annotation
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/7261881.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/jhqhhxs/5610870864.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/V7PgiHO/fractions_worksheets_year_6.pdfIn PDF document text
    • http://ganoxotemifava.22web.org/97947122997.pdfIn PDF document text
    • https://ralifanexipoker.weebly.com/uploads/1/3/1/3/131380500/wazutijebatiro-lamirinizexos-pekobimekar.pdfIn PDF document text
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/sedax.pdfIn PDF document text
    • http://lofupijuwox.22web.org/tiromeku.pdfIn PDF document text
    • http://daxogupifixago.iblogger.org/ap_polytechnic_lecturer_notification_2019.pdfIn PDF document text
    • http://penoligis.22web.org/beta_hcg_test_report_format.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/9966694.pdfIn PDF document text
    • https://cdn.sqhk.co/mifebemige/je1Hibu/wells_fargo_dealer_services_payoff_information.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/ac7063ac-874d-4777-b4a5-72dc73c45965/first_alert_carbon_monoxide_detector_manual_co400.pdfIn PDF document text
    • http://japimokenixovip.epizy.com/34127784498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668e17f8-e7d9-436e-a2ca-0514ce815573/pubatojenezixaruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc7b920-c268-48ba-9cdf-e089328a3c4c/xuxidaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/formato_de_contrato_mantenimiento_preventivo_de_aires_acondicionados.pdfIn PDF document text
    • http://japixunatavaxi.rf.gd/statistical_methods_for_social_sciences.pdfIn PDF document text
    • http://kepirodineloga.epizy.com/tiwog.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/33297958927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dea1617-16e9-4210-8f23-19e4755a6808/judukivisebepexunisu.pdfIn PDF document text
    • http://mujunuge.rf.gd/free_printable_t_shirt_order_form_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ba93c8-58c6-459a-abee-50c393cdd9c2/vuzaledejarerunesalag.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_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 5304 bytes
SHA-256: ff91d3cf6676c0ad1af146d90c38ee7f4c29dcf48a96c5aadb2358ca8813fcfe
font_01_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 10320 bytes
SHA-256: 1a2ed1caecaf4be074af437542789af09e86aa378c91361959805810b3f2aa5b
font_02_sfnt_off00012afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176